diff --git a/Headers/gnustep/base/NSGDictionary.h b/Headers/gnustep/base/NSGDictionary.h
index 27b5053b8..3befaa82d 100644
--- a/Headers/gnustep/base/NSGDictionary.h
+++ b/Headers/gnustep/base/NSGDictionary.h
@@ -26,6 +26,7 @@
 
 #include <objects/stdobjects.h>
 #include <Foundation/NSDictionary.h>
+#include <objects/Dictionary.h>
 #include <objects/elt.h>
 
 @interface NSGDictionary : NSDictionary