diff --git a/desmume/src/gtk-glade/printscreen.cpp b/desmume/src/gtk-glade/printscreen.cpp
index 0526cb0d1..63c564bda 100755
--- a/desmume/src/gtk-glade/printscreen.cpp
+++ b/desmume/src/gtk-glade/printscreen.cpp
@@ -66,6 +66,8 @@ int WriteBMP(const char *filename,u16 *bmp){
     imageheader.height = 192*2;
     
     FILE *fichier = fopen(filename,"wb");
+    if (!fichier)
+         return 0;
     //fwrite(&fileheader, 1, 14, fichier);
 
     //fwrite(&imageheader, 1, 40, fichier);
diff --git a/desmume/src/gtk/gtk-compat.cpp b/desmume/src/gtk/gtk-compat.cpp
index eba86609c..e1aae2dac 100644
--- a/desmume/src/gtk/gtk-compat.cpp
+++ b/desmume/src/gtk/gtk-compat.cpp
@@ -23,11 +23,16 @@
 gboolean g_file_set_contents(const gchar * filename, const gchar * contents, gssize len, GError ** error) {
 	FILE * file = fopen(filename, "w");
 
+	if (!file)
+		return FALSE;
+
 	if (len == -1)
 		fprintf(file, "%s", contents);
 	else
 		fwrite(contents, 1, len, file);
 
 	fclose(file);
+
+	return TRUE;
 }
 #endif
diff --git a/desmume/src/gtk/main.cpp b/desmume/src/gtk/main.cpp
index 0c1f571f2..94d94a836 100644
--- a/desmume/src/gtk/main.cpp
+++ b/desmume/src/gtk/main.cpp
@@ -293,6 +293,7 @@ static int Write_ConfigFile()
 	int i;
 	GKeyFile * keyfile;
 	gchar *contents;
+	gboolean ret;
 
 	keyfile = g_key_file_new();
 
@@ -307,7 +308,9 @@ static int Write_ConfigFile()
 // 	}
 
 	contents = g_key_file_to_data(keyfile, 0, 0);	
-	g_file_set_contents(CONFIG_FILE, contents, -1, 0);
+	ret = g_file_set_contents(CONFIG_FILE, contents, -1, NULL);
+	if (!ret)
+		fprintf(stderr, "Failed to write to %s\n", CONFIG_FILE);
 	g_free (contents);
 
 	g_key_file_free(keyfile);
@@ -1190,6 +1193,8 @@ static int WriteBMP(const char *filename,u16 *bmp)
     imageheader.height = 192*2;
 
     FILE *fichier = fopen(filename,"wb");
+    if (!fichier)
+        return 0;
     //fwrite(&fileheader, 1, 14, fichier);
 
     //fwrite(&imageheader, 1, 40, fichier);