diff --git a/usr.bin/make/nonints.h b/usr.bin/make/nonints.h
index ab0ce72348ec..a48b2487e826 100644
--- a/usr.bin/make/nonints.h
+++ b/usr.bin/make/nonints.h
@@ -1,4 +1,4 @@
-/*	$NetBSD: nonints.h,v 1.90 2020/08/08 13:00:07 rillig Exp $	*/
+/*	$NetBSD: nonints.h,v 1.91 2020/08/09 13:05:04 rillig Exp $	*/
 
 /*-
  * Copyright (c) 1988, 1989, 1990, 1993
@@ -200,7 +200,7 @@ void Var_End(void);
 void Var_Stats(void);
 void Var_Dump(GNode *);
 void Var_ExportVars(void);
-void Var_Export(const char *, int);
+void Var_Export(const char *, Boolean);
 void Var_UnExport(const char *);
 
 /* util.c */
diff --git a/usr.bin/make/parse.c b/usr.bin/make/parse.c
index 1a76585ea1f4..1db9fca9fb12 100644
--- a/usr.bin/make/parse.c
+++ b/usr.bin/make/parse.c
@@ -1,4 +1,4 @@
-/*	$NetBSD: parse.c,v 1.249 2020/08/06 16:03:04 sjg Exp $	*/
+/*	$NetBSD: parse.c,v 1.250 2020/08/09 13:05:04 rillig Exp $	*/
 
 /*
  * Copyright (c) 1988, 1989, 1990, 1993
@@ -69,14 +69,14 @@
  */
 
 #ifndef MAKE_NATIVE
-static char rcsid[] = "$NetBSD: parse.c,v 1.249 2020/08/06 16:03:04 sjg Exp $";
+static char rcsid[] = "$NetBSD: parse.c,v 1.250 2020/08/09 13:05:04 rillig Exp $";
 #else
 #include <sys/cdefs.h>
 #ifndef lint
 #if 0
 static char sccsid[] = "@(#)parse.c	8.3 (Berkeley) 3/19/94";
 #else
-__RCSID("$NetBSD: parse.c,v 1.249 2020/08/06 16:03:04 sjg Exp $");
+__RCSID("$NetBSD: parse.c,v 1.250 2020/08/09 13:05:04 rillig Exp $");
 #endif
 #endif /* not lint */
 #endif
@@ -2020,7 +2020,7 @@ Parse_DoVar(char *line, GNode *ctxt)
     } else if (strcmp(line, MAKE_JOB_PREFIX) == 0) {
 	Job_SetPrefix();
     } else if (strcmp(line, MAKE_EXPORTED) == 0) {
-	Var_Export(cp, 0);
+	Var_Export(cp, FALSE);
     }
     if (freeCp)
 	free(cp);
@@ -3098,7 +3098,7 @@ Parse_File(const char *name, int fd)
 		} else if (strncmp(cp, "export", 6) == 0) {
 		    for (cp += 6; isspace((unsigned char) *cp); cp++)
 			continue;
-		    Var_Export(cp, 1);
+		    Var_Export(cp, TRUE);
 		    continue;
 		} else if (strncmp(cp, "unexport", 8) == 0) {
 		    Var_UnExport(cp);
diff --git a/usr.bin/make/var.c b/usr.bin/make/var.c
index 5c5d797d21cf..0b60a73e876a 100644
--- a/usr.bin/make/var.c
+++ b/usr.bin/make/var.c
@@ -1,4 +1,4 @@
-/*	$NetBSD: var.c,v 1.440 2020/08/09 11:04:05 rillig Exp $	*/
+/*	$NetBSD: var.c,v 1.441 2020/08/09 13:05:04 rillig Exp $	*/
 
 /*
  * Copyright (c) 1988, 1989, 1990, 1993
@@ -69,14 +69,14 @@
  */
 
 #ifndef MAKE_NATIVE
-static char rcsid[] = "$NetBSD: var.c,v 1.440 2020/08/09 11:04:05 rillig Exp $";
+static char rcsid[] = "$NetBSD: var.c,v 1.441 2020/08/09 13:05:04 rillig Exp $";
 #else
 #include <sys/cdefs.h>
 #ifndef lint
 #if 0
 static char sccsid[] = "@(#)var.c	8.3 (Berkeley) 3/19/94";
 #else
-__RCSID("$NetBSD: var.c,v 1.440 2020/08/09 11:04:05 rillig Exp $");
+__RCSID("$NetBSD: var.c,v 1.441 2020/08/09 13:05:04 rillig Exp $");
 #endif
 #endif /* not lint */
 #endif
@@ -623,10 +623,14 @@ Var_ExportVars(void)
 
 /*
  * This is called when .export is seen or .MAKE.EXPORTED is modified.
+ *
  * It is also called when any exported variable is modified.
+ * XXX: Is it really?
+ *
+ * str has the format "[-env|-literal] varname...".
  */
 void
-Var_Export(const char *str, int isExport)
+Var_Export(const char *str, Boolean isExport)
 {
     VarExportFlags flags;
     char *val;