diff --git a/sesman/sesman.c b/sesman/sesman.c
index 88eeb346..64728376 100644
--- a/sesman/sesman.c
+++ b/sesman/sesman.c
@@ -241,7 +241,7 @@ main(int argc, char **argv)
     {
         g_printf("sesman is already running.\n");
         g_printf("if it's not running, try removing ");
-        g_printf(pid_file);
+        g_printf("%s", pid_file);
         g_printf("\n");
         g_deinit();
         g_exit(1);
diff --git a/xrdp/xrdp_mm.c b/xrdp/xrdp_mm.c
index 64ebdaf4..1e1c34c1 100644
--- a/xrdp/xrdp_mm.c
+++ b/xrdp/xrdp_mm.c
@@ -2658,7 +2658,7 @@ server_msg(struct xrdp_mod *mod, char *msg, int code)
 
     if (code == 1)
     {
-        g_writeln(msg);
+        g_writeln("%s",msg);
         return 0;
     }
 
diff --git a/xrdp/xrdp_wm.c b/xrdp/xrdp_wm.c
index 362d0d0a..ddadbe5a 100644
--- a/xrdp/xrdp_wm.c
+++ b/xrdp/xrdp_wm.c
@@ -1867,7 +1867,7 @@ void add_string_to_logwindow(char *msg, struct list *log)
     do
     {
         new_part_message = g_strndup(current_pointer, LOG_WINDOW_CHAR_PER_LINE) ;
-        g_writeln(new_part_message);
+        g_writeln("%s",new_part_message);
         list_add_item(log, (long)new_part_message);
         processedlen = processedlen + g_strlen(new_part_message);
         current_pointer = current_pointer + g_strlen(new_part_message) ;