diff --git a/cmd/wm/client.c b/cmd/wm/client.c
index 26ec7693..eb999e50 100644
--- a/cmd/wm/client.c
+++ b/cmd/wm/client.c
@@ -162,7 +162,7 @@ void handle_client_property(Client * c, XPropertyEvent * e)
 	char buf[1024];
 	long msize;
 
-	buf[0] = '\0';
+	buf[0] = 0;
 	if (e->state == PropertyDelete)
 		return;					/* ignore */
 
diff --git a/cmd/wmibar.c b/cmd/wmibar.c
index 66e3cace..d91e5149 100644
--- a/cmd/wmibar.c
+++ b/cmd/wmibar.c
@@ -322,7 +322,7 @@ static void handle_buttonpress(XButtonPressedEvent * e)
 
 	for (i = 0; items && items[i]; i++) {
 		if (blitz_ispointinrect(e->x, e->y, &items[i]->d.rect)) {
-			path[0] = '\0';
+			path[0] = 0;
 			wmii_get_ixppath(items[i]->root, path, sizeof(path));
 			snprintf(buf, MAX_BUF, "%s/b%upress", path, e->button);
 			if ((p = ixp_walk(ixps, buf)))
@@ -371,7 +371,7 @@ static void handle_after_write(IXPServer * s, File * f)
 	Item *item;
 	char buf[512];
 
-	buf[0] = '\0';
+	buf[0] = 0;
 	if (!strncmp(f->name, "data", 5)) {
 		if ((item = get_item_for_file(f->parent))) {
 			wmii_get_ixppath(f->parent, buf, sizeof(buf));
@@ -527,7 +527,7 @@ int main(int argc, char *argv[])
 	XSetErrorHandler(dummy_error_handler);
 	screen_num = DefaultScreen(dpy);
 
-	geom[0] = '\0';
+	geom[0] = 0;
 	if (argc > i)
 		cext_strlcpy(geom, argv[i], sizeof(geom));
 
diff --git a/cmd/wmifs.c b/cmd/wmifs.c
index 710cac59..ba25ce8a 100644
--- a/cmd/wmifs.c
+++ b/cmd/wmifs.c
@@ -126,9 +126,9 @@ static void bind(void *obj, char *arg)
 				arg);
 		return;					/* shortcut with empty argument */
 	}
-	*sfile = '\0';
+	*sfile = 0;
 	sfile++;
-	if (*sfile == '\0') {
+	if (*sfile == 0) {
 		fprintf(stderr,
 				"wmifs: bind: '%s' without socket argument, ignoring\n",
 				arg);
@@ -209,7 +209,7 @@ static File *fixp_create(IXPServer * s, char *path)
 	}
 	/* route to b */
 	len = strlen(b->prefix);
-	b->client->create(b->client, path[len] == '\0' ? "/" : &path[len]);
+	b->client->create(b->client, path[len] == 0 ? "/" : &path[len]);
 	if (b->client->errstr) {
 		if (!strcmp(b->client->errstr, DEAD_SERVER))
 			_unbind(b);
@@ -229,7 +229,7 @@ static File *fixp_open(IXPServer * s, char *path)
 	}
 	/* route to b */
 	len = strlen(b->prefix);
-	fd = b->client->open(b->client, path[len] == '\0' ? "/" : &path[len]);
+	fd = b->client->open(b->client, path[len] == 0 ? "/" : &path[len]);
 	if (b->client->errstr) {
 		set_error(s, b->client->errstr);
 		if (!strcmp(b->client->errstr, DEAD_SERVER))
@@ -311,7 +311,7 @@ static void fixp_remove(IXPServer * s, char *path)
 	}
 	/* route to b */
 	len = strlen(b->prefix);
-	b->client->remove(b->client, path[len] == '\0' ? "/" : &path[len]);
+	b->client->remove(b->client, path[len] == 0 ? "/" : &path[len]);
 	if (b->client->errstr) {
 		set_error(s, b->client->errstr);
 		if (!strcmp(b->client->errstr, DEAD_SERVER))
diff --git a/cmd/wmikeys.c b/cmd/wmikeys.c
index 3029d2e5..d7dd2682 100644
--- a/cmd/wmikeys.c
+++ b/cmd/wmikeys.c
@@ -485,7 +485,7 @@ int main(int argc, char *argv[])
 	}
 	XSetErrorHandler(dummy_error_handler);
 	screen_num = DefaultScreen(dpy);
-	size[0] = '\0';
+	size[0] = 0;
 	if (argc > i)
 		cext_strlcpy(size, argv[i], sizeof(size));
 
diff --git a/cmd/wmimenu.c b/cmd/wmimenu.c
index da11e20a..880402e4 100644
--- a/cmd/wmimenu.c
+++ b/cmd/wmimenu.c
@@ -99,7 +99,7 @@ static void _exec(char *cmd)
 {
 	char *rc = cmd;
 
-	if (!cmd || cmd[0] == '\0')
+	if (!cmd || cmd[0] == 0)
 		return;
 
 	if (items && items[0]) {
@@ -349,12 +349,12 @@ static void handle_kpress(XKeyEvent * e)
 	static char text[4096];
 	size_t len = 0;
 
-	text[0] = '\0';
+	text[0] = 0;
 	if (files[M_COMMAND]->content) {
 		cext_strlcpy(text, files[M_COMMAND]->content, sizeof(text));
 		len = strlen(text);
 	}
-	buf[0] = '\0';
+	buf[0] = 0;
 	num = XLookupString(e, buf, sizeof(buf), &ksym, 0);
 
 	if (IsFunctionKey(ksym) || IsKeypadKey(ksym)
@@ -448,7 +448,7 @@ static void handle_kpress(XKeyEvent * e)
 			for (size = 0; items && items[size]; size++);
 			if (i) {
 				do
-					text[--i] = '\0';
+					text[--i] = 0;
 				while (size && i && size == update_items(text));
 			}
 			set_text(text);
@@ -457,7 +457,7 @@ static void handle_kpress(XKeyEvent * e)
 		break;
 	default:
 		if ((num == 1) && !iscntrl((int) buf[0])) {
-			buf[num] = '\0';
+			buf[num] = 0;
 			if (len > 0)
 				cext_strlcat(text, buf, sizeof(text));
 			else
@@ -648,7 +648,7 @@ int main(int argc, char *argv[])
 	}
 	screen_num = DefaultScreen(dpy);
 
-	size[0] = '\0';
+	size[0] = 0;
 	if (argc > i)
 		cext_strlcpy(size, argv[i], sizeof(size));
 
diff --git a/cmd/wmir.c b/cmd/wmir.c
index 327e0b5c..3f4b7ddf 100644
--- a/cmd/wmir.c
+++ b/cmd/wmir.c
@@ -91,7 +91,7 @@ static void perform(char *action, char *file, char *content)
 					return;
 				break;
 			}
-			output[out_len] = '\0';
+			output[out_len] = 0;
 			fprintf(stdout, "%s", output);
 		}
 		while (out_len == 2048);
@@ -170,9 +170,9 @@ int main(int argc, char *argv[])
 		char *action, *file, *content;
 		while (fgets(line, 4096, stdin)) {
 			p = line;
-			while (*p != '\0' && (*p == ' ' || *p == '\t'))
+			while (*p != 0 && (*p == ' ' || *p == '\t'))
 				p++;
-			if (*p == '\0')
+			if (*p == 0)
 				continue;		/* empty line */
 			if (strncmp(p, "create ", 7) &&
 				strncmp(p, "write ", 6) &&
@@ -180,33 +180,33 @@ int main(int argc, char *argv[])
 				continue;
 
 			action = p;
-			while (*p != '\0' && *p != ' ' && *p != '\t' && *p != '\n')
+			while (*p != 0 && *p != ' ' && *p != '\t' && *p != '\n')
 				p++;
-			if (*p == '\0' || *p == '\n')
+			if (*p == 0 || *p == '\n')
 				continue;		/* ignore bogus command */
-			*p = '\0';
+			*p = 0;
 			p++;
-			while (*p != '\0' && (*p == ' ' || *p == '\t'))
+			while (*p != 0 && (*p == ' ' || *p == '\t'))
 				p++;
-			if (*p == '\0')
+			if (*p == 0)
 				continue;		/* ignore bogus command */
 			file = p;
-			while (*p != '\0' && *p != ' ' && *p != '\t' && *p != '\n')
+			while (*p != 0 && *p != ' ' && *p != '\t' && *p != '\n')
 				p++;
-			if (*p == '\0' || *p == '\n') {
+			if (*p == 0 || *p == '\n') {
 				content = 0;
-				*p = '\0';
+				*p = 0;
 			} else {
-				*p = '\0';
+				*p = 0;
 				p++;
 				content = p;
 			}
-			if (file[0] == '\0')
+			if (file[0] == 0)
 				continue;
 			if (content) {
 				static size_t len;
 				if ((len = strlen(content)))
-					content[len - 1] = '\0';
+					content[len - 1] = 0;
 			}
 			perform(action, file, content);
 			if (c->errstr)
diff --git a/libcext/strlcat.c b/libcext/strlcat.c
index a140eb51..a9400010 100644
--- a/libcext/strlcat.c
+++ b/libcext/strlcat.c
@@ -34,21 +34,21 @@ size_t cext_strlcat(char *dst, const char *src, size_t siz)
 	size_t dlen;
 
 	/* Find the end of dst and adjust bytes left but don't go past end */
-	while (n-- != 0 && *d != '\0')
+	while (n-- != 0 && *d != 0)
 		d++;
 	dlen = d - dst;
 	n = siz - dlen;
 
 	if (n == 0)
 		return (dlen + strlen(s));
-	while (*s != '\0') {
+	while (*s != 0) {
 		if (n != 1) {
 			*d++ = *s;
 			n--;
 		}
 		s++;
 	}
-	*d = '\0';
+	*d = 0;
 
 	return (dlen + (s - src));	/* count does not include NUL */
 }
diff --git a/libcext/strtonum.c b/libcext/strtonum.c
index 142d7206..9c95b109 100644
--- a/libcext/strtonum.c
+++ b/libcext/strtonum.c
@@ -44,7 +44,7 @@ long long cext_strtonum(const char *numstr, long long minval, long long maxval,
 		error = INVALID;
 	else {
 		ll = strtoll(numstr, &ep, 10);
-		if (numstr == ep || *ep != '\0')
+		if (numstr == ep || *ep != 0)
 			error = INVALID;
 		else if (errno == ERANGE || ll < minval)
 			error = TOOSMALL;
diff --git a/libcext/tokenize.c b/libcext/tokenize.c
index a621de07..21629e24 100644
--- a/libcext/tokenize.c
+++ b/libcext/tokenize.c
@@ -16,11 +16,11 @@ size_t cext_tokenize(char **result, size_t reslen, char *str, char delim)
 		return 0;
 	for (n = str; *n == ' '; n++);
 	p = n;
-	for (i = 0; *n != '\0';) {
+	for (i = 0; *n != 0;) {
 		if (i == reslen)
 			return i;
 		if (*n == delim) {
-			*n = '\0';
+			*n = 0;
 			if (strlen(p))
 				result[i++] = p;
 			p = ++n;
diff --git a/libixp/ramfs.c b/libixp/ramfs.c
index fd066715..dc4381d8 100644
--- a/libixp/ramfs.c
+++ b/libixp/ramfs.c
@@ -192,7 +192,7 @@ ixp_write(IXPServer * s, int fd, size_t offset, void *content,
 		}
 		memcpy((char *) f->content + offset, content, in_len);
 		/* internal EOF character */
-		((char *) f->content)[f->size] = '\0';
+		((char *) f->content)[f->size] = 0;
 	} else if (!offset) {
 		/* blank file */
 		if (f->content)
diff --git a/libixp2/client.c b/libixp2/client.c
index 051a321f..805fd73e 100644
--- a/libixp2/client.c
+++ b/libixp2/client.c
@@ -62,7 +62,7 @@ int ixp_client_init(IXPClient * c, char *sockfile)
 	c->fcall.fid = c->root_fid;
 	c->fcall.afid = IXP_NOFID;
 	cext_strlcpy(c->fcall.uname, getenv("USER"), sizeof(c->fcall.uname));
-	c->fcall.aname[0] = '\0';
+	c->fcall.aname[0] = 0;
 	if (!do_fcall(c)) {
 		ixp_client_deinit(c);
 		return FALSE;
diff --git a/libixp2/convert.c b/libixp2/convert.c
index 3769072f..aa523130 100644
--- a/libixp2/convert.c
+++ b/libixp2/convert.c
@@ -87,7 +87,7 @@ void *ixp_dec_string(u8 * msg, char *string, u16 stringlen, u16 * len)
 		return msg;
 	if (*len > stringlen - 1)
 		/* might never happen if stringlen == IXP_MAX_MSG */
-		string[0] = '\0';
+		string[0] = 0;
 	else {
 		memcpy(string, msg, *len);
 		string[*len] = 0;
diff --git a/liblitz/draw.c b/liblitz/draw.c
index 5ccc8abb..5875b14d 100644
--- a/liblitz/draw.c
+++ b/liblitz/draw.c
@@ -27,7 +27,7 @@ unsigned long blitz_loadcolor(Display * dpy, int mon, char *colstr)
 	char col[8];
 
 	cext_strlcpy(col, colstr, sizeof(col));
-	col[7] = '\0';
+	col[7] = 0;
 	XAllocNamedColor(dpy, DefaultColormap(dpy, mon), col, &color, &color);
 	return color.pixel;
 }
@@ -92,7 +92,7 @@ static void draw_text(Display * dpy, Draw * d)
 
 	/* shorten text if necessary */
 	while (len && (w = XTextWidth(d->font, text, len)) > d->rect.width) {
-		text[len - 1] = '\0';
+		text[len - 1] = 0;
 		len--;
 		shortened = TRUE;
 	}
diff --git a/liblitz/kb.c b/liblitz/kb.c
index dfa40c23..d6611462 100644
--- a/liblitz/kb.c
+++ b/liblitz/kb.c
@@ -11,7 +11,7 @@
 char *blitz_modtostr(unsigned long mod)
 {
 	char result[60];
-	result[0] = '\0';
+	result[0] = 0;
 
 	if (mod & ShiftMask)
 		cext_strlcat(result, "S-", sizeof(result));
diff --git a/liblitz/mouse.c b/liblitz/mouse.c
index 686eee18..ca00cf46 100644
--- a/liblitz/mouse.c
+++ b/liblitz/mouse.c
@@ -13,7 +13,7 @@
 char *blitz_buttontostr(unsigned int button)
 {
 	char result[8];
-	result[0] = '\0';
+	result[0] = 0;
 	snprintf(result, 8, "Button%ud", button - Button1);
 	return cext_estrdup(result);
 }
diff --git a/libwmii/ixputil.c b/libwmii/ixputil.c
index 310f2edf..8d07be78 100644
--- a/libwmii/ixputil.c
+++ b/libwmii/ixputil.c
@@ -32,11 +32,11 @@ void wmii_get_ixppath(File * f, char *path, size_t size)
 {
 	char buf[512];
 
-	buf[0] = '\0';
+	buf[0] = 0;
 	if (path)
 		cext_strlcpy(buf, path, sizeof(buf));
 	snprintf(path, size, "%s/", f->name);
-	if (buf[0] != '\0')
+	if (buf[0] != 0)
 		cext_strlcat(path, buf, size);
 	if (f->parent)
 		wmii_get_ixppath(f->parent, path, size);
diff --git a/libwmii/wm.c b/libwmii/wm.c
index 3d40886c..69978965 100644
--- a/libwmii/wm.c
+++ b/libwmii/wm.c
@@ -40,7 +40,7 @@ void win_prop(Display * dpy, Window w, Atom a, char *res, int len)
 		cext_strlcpy(res, (char *) prop, len);
 		XFree(prop);
 	}
-	res[len - 1] = '\0';
+	res[len - 1] = 0;
 	XSync(dpy, False);
 }