diff --git a/mrblib/Makefile b/mrblib/Makefile
index f56d00b5a..a91f4ce24 100644
--- a/mrblib/Makefile
+++ b/mrblib/Makefile
@@ -70,4 +70,4 @@ $(RLIB) : $(MRBS)
 .PHONY : clean
 clean :
 	@echo "make: removing targets, objects and depend files of `pwd`"
-	-rm -f $(MRBC) $(MLIB) $(CLIB) $(RLIB) $(DLIB) $(DEPLIB)
+	-rm -f $(MRBC) $(MLIB) $(CLIB) $(RLIB) $(DLIB) $(DEPLIB) $(LIBR)