diff --git a/src/cmd/gc/Makefile b/src/cmd/gc/Makefile
index 6629361d4e2..40254c709c9 100644
--- a/src/cmd/gc/Makefile
+++ b/src/cmd/gc/Makefile
@@ -64,6 +64,6 @@ opnames.h:	mkopnames go.h
 	./mkopnames go.h >opnames.h
 
 clean:
-	rm -f *.[568o] enam.c [568].out a.out y.tab.h y.tab.c $(LIB) mkbuiltin1 builtin.c _builtin.c
+	rm -f *.[568o] enam.c [568].out a.out y.tab.h y.tab.c $(LIB) mkbuiltin1 builtin.c _builtin.c opnames.h
 
 install: $(LIB)