diff --git a/library/GNUmakefile.os4 b/library/GNUmakefile.os4
index 1c0d66e..cc16fc1 100644
--- a/library/GNUmakefile.os4
+++ b/library/GNUmakefile.os4
@@ -274,7 +274,7 @@ $(CC) $(AFLAGS) -o $@ -c $< $(LOG_COMMAND)
 endef
 
 define MAKELIB
--$(MAKEDIR) $@
+-$(MAKEDIR) $(@D)
 $(DELETE) $@
 echo "Making $@"
 $(AR) $@ $^ $(LOG_COMMAND)