diff --git a/gtk/gtktypes.h b/gtk/gtktypes.h
index 95bac78d16..72bc9f6f06 100644
--- a/gtk/gtktypes.h
+++ b/gtk/gtktypes.h
@@ -34,7 +34,6 @@ G_BEGIN_DECLS
 typedef struct _GtkAdjustment          GtkAdjustment;
 typedef struct _GtkBuilder             GtkBuilder;
 typedef struct _GtkClipboard	       GtkClipboard;
-typedef struct _GtkIconSource          GtkIconSource;
 typedef struct _GtkRequisition	       GtkRequisition;
 typedef struct _GtkSelectionData       GtkSelectionData;
 typedef struct _GtkSettings            GtkSettings;