diff --git a/tests/testgtk.c b/tests/testgtk.c
index 45f6ce6072..34d5f31a8c 100644
--- a/tests/testgtk.c
+++ b/tests/testgtk.c
@@ -430,7 +430,7 @@ pattern_set_bg (GtkWidget   *widget,
 		GdkWindow   *child,
 		gint         level)
 {
-  static const GdkRGBA colors[] = {
+  static GdkRGBA colors[] = {
     { 0.27, 0.27, 1.0, 1.0 },
     { 0.53, 0.53, 1.0, 1.0},
     { 0.67, 0.67, 1.0, 1.0 }