diff --git a/util/ack/pc/Makefile b/util/ack/pc/Makefile
index 9089e908a..4d4f340fa 100644
--- a/util/ack/pc/Makefile
+++ b/util/ack/pc/Makefile
@@ -16,7 +16,7 @@ lint:
 		lint -hpxc -I$h em_pc.c
 
 clean:
-		rm -f *.o *.old
+		rm -f *.o *.old em_pc
 
 opr:
 		make pr ^ opr