diff --git a/src/cmd/8l/prof.c b/src/cmd/8l/prof.c
index 4e95fad7932..d99c5e4084c 100644
--- a/src/cmd/8l/prof.c
+++ b/src/cmd/8l/prof.c
@@ -36,7 +36,7 @@
 void
 doprof1(void)
 {
-#if 0	// TODO(rsc)
+#ifdef	NOTDEF  // TODO(rsc)
 	Sym *s;
 	int32 n;
 	Prog *p, *q;