diff --git a/Source/DocMakefile b/Source/DocMakefile
index 8cf02cb80..2a6ee7115 100644
--- a/Source/DocMakefile
+++ b/Source/DocMakefile
@@ -162,6 +162,7 @@ Gui_AGSDOC_FLAGS = \
 	-VariablesTemplate TypesAndConstants \
 	-WordMap '{\
 	APPKIT_EXPORT=extern;APPKIT_DECLARE="";\
+	DEFINE_RINT_IF_MISSING=""; \
 	}' -Up Gui
 
 include $(GNUSTEP_MAKEFILES)/documentation.make