diff --git a/mach/ns/libem/Makefile b/mach/ns/libem/Makefile
index 78211c407..9f7b50d8d 100644
--- a/mach/ns/libem/Makefile
+++ b/mach/ns/libem/Makefile
@@ -19,7 +19,8 @@ libem_o.a:	libem_s.a
 		march . libem_o.a
 
 clean:
-		rm -f *.o
+		rm -f *.o libem_o.a nohup.out Out
+
 opr :
 		make pr | opr