diff --git a/desmume/src/gtk/main.cpp b/desmume/src/gtk/main.cpp
index fa86dd013..65966139d 100644
--- a/desmume/src/gtk/main.cpp
+++ b/desmume/src/gtk/main.cpp
@@ -66,6 +66,9 @@
 
 #include "DeSmuME.xpm"
 
+#undef GPOINTER_TO_INT
+#define GPOINTER_TO_INT(p) ((gint)  (glong) (p))
+
 #define EMULOOP_PRIO (G_PRIORITY_HIGH_IDLE + 20)
 
 #if GTK_CHECK_VERSION(2,10,0)