Index: test/api/multithreaded/Makefile
===================================================================
--- test/api/multithreaded/Makefile
+++ test/api/multithreaded/Makefile
@@ -6,4 +6,4 @@
 include $(LEVEL)/Makefile.rules
 
 clean::
-	rm $(wildcard -rf *.o *.d *.dSYM)
+	rm -rf $(wildcard *.o *.d *.dSYM)