diff --git a/desmume/src/gtk-glade/dTools/callbacks_1_ioregs.cpp b/desmume/src/gtk-glade/dTools/callbacks_1_ioregs.cpp
index 96915839d..6088ede6a 100755
--- a/desmume/src/gtk-glade/dTools/callbacks_1_ioregs.cpp
+++ b/desmume/src/gtk-glade/dTools/callbacks_1_ioregs.cpp
@@ -66,7 +66,7 @@ static void wtools_1_update () {
 static u32 mem[NBR_IO_REGS];
 
 static void update_regs_fast(){
-	char text[10];
+	char text[11];
 	int i; u32 w, m;
 	for( i = 0; i < NBR_IO_REGS; i++ )
 	{	
diff --git a/desmume/src/gtk-glade/dTools/callbacks_4_tileview.cpp b/desmume/src/gtk-glade/dTools/callbacks_4_tileview.cpp
index dda41d575..a8dc4ca24 100755
--- a/desmume/src/gtk-glade/dTools/callbacks_4_tileview.cpp
+++ b/desmume/src/gtk-glade/dTools/callbacks_4_tileview.cpp
@@ -174,7 +174,7 @@ static void refresh() {
 	if (pal) {
 		pal += palnum*16;
 		for (tile_n=0; tile_n<1024; tile_n++) {
-			for (index=0; index<64; index++) {
+			for (index=0; index<64-1; index++) {
 				if (index & 1) continue;
 				palette_16[index]  =pal[*index16 & 15];
 				palette_16[index+1]=pal[*index16 >> 4];