diff --git a/Tools/make_strings/GNUmakefile b/Tools/make_strings/GNUmakefile
index 02c00ad74..5cd0594a1 100644
--- a/Tools/make_strings/GNUmakefile
+++ b/Tools/make_strings/GNUmakefile
@@ -38,5 +38,4 @@ make_strings_OBJC_FILES = \
 include GNUmakefile.preamble
 
 include $(GNUSTEP_MAKEFILES)/tool.make
-include $(GNUSTEP_MAKEFILES)/ctool.make