diff --git a/image/stock_dialog_stop_48.xpm b/image/stock_dialog_stop_48.xpm
index f2086088f9..22085d3bb3 100644
--- a/image/stock_dialog_stop_48.xpm
+++ b/image/stock_dialog_stop_48.xpm
@@ -1,5 +1,5 @@
 /* XPM */
-static char * stock_dialog_stop_48_xpm[] = {
+static const char * stock_dialog_stop_48_xpm[] = {
 "48 48 927 2",
 "  	c None",
 ". 	c #524D4D",