diff --git a/Data/Icons/monteverdi2.xpm b/Data/Icons/monteverdi2.xpm
index f6f59489392e0eb8040daffa581120e08610d10b..49bedf1da6b900a3d0701dd6ba61bfe71670f598 100644
--- a/Data/Icons/monteverdi2.xpm
+++ b/Data/Icons/monteverdi2.xpm
@@ -1,5 +1,5 @@
 /* XPM */
-static char * monteverdi2_xpm[] = {
+static const char * monteverdi2_xpm[] = {
 "32 32 456 2",
 "  	c None",
 ". 	c #212121",