diff --git a/gio/giotypes.h b/gio/giotypes.h
index 6f6987eca..c9ad8dd90 100644
--- a/gio/giotypes.h
+++ b/gio/giotypes.h
@@ -122,7 +122,6 @@ typedef struct _GLoadableIcon                 GLoadableIcon; /* Dummy typedef */
 typedef struct _GBytesIcon                    GBytesIcon;
 typedef struct _GMemoryInputStream            GMemoryInputStream;
 typedef struct _GMemoryOutputStream           GMemoryOutputStream;
-typedef struct _GMemoryMonitor                GMemoryMonitor;
 
 /**
  * GMount: