diff --git a/gtk/gtktreepopoverprivate.h b/gtk/gtktreepopoverprivate.h
index a43bfcb15f..2656f90a1d 100644
--- a/gtk/gtktreepopoverprivate.h
+++ b/gtk/gtktreepopoverprivate.h
@@ -17,7 +17,7 @@
  * Author: Matthias Clasen
  */
 
-#ifndef __GTK_TREE_POPOPVER_PRIVATE_H__
+#ifndef __GTK_TREE_POPOVER_PRIVATE_H__
 #define __GTK_TREE_POPOVER_PRIVATE_H__
 
 #include <gtk/gtk.h>