diff --git a/src/gtk/window.cpp b/src/gtk/window.cpp
index 12a845a60e..05a2f829cb 100644
--- a/src/gtk/window.cpp
+++ b/src/gtk/window.cpp
@@ -3744,7 +3744,7 @@ static gint gs_pop_y = 0;
 
 static void wxPopupMenuPositionCallback( GtkMenu *menu,
                                          gint *x, gint *y,
-                                         gpointer * WXUNUSED(user_data) )
+                                         gpointer WXUNUSED(user_data) )
 {
     // ensure that the menu appears entirely on screen
     GtkRequisition req;
diff --git a/src/gtk1/window.cpp b/src/gtk1/window.cpp
index 12a845a60e..05a2f829cb 100644
--- a/src/gtk1/window.cpp
+++ b/src/gtk1/window.cpp
@@ -3744,7 +3744,7 @@ static gint gs_pop_y = 0;
 
 static void wxPopupMenuPositionCallback( GtkMenu *menu,
                                          gint *x, gint *y,
-                                         gpointer * WXUNUSED(user_data) )
+                                         gpointer WXUNUSED(user_data) )
 {
     // ensure that the menu appears entirely on screen
     GtkRequisition req;