diff --git a/Makefile b/Makefile
index d0973b2..04d1d73 100644
--- a/Makefile
+++ b/Makefile
@@ -13,7 +13,7 @@ clean:
 
 
 o:
-	mkdir $<
+	mkdir o
 
 merlin-link: o/link.o o/mapped_file.o o/omf.o o/set_file_type.o afp/libafp.a
 	$(LINK.o) $^ $(LDLIBS) -o $@