diff --git a/bin/sh/show.c b/bin/sh/show.c
index 8cfc35659fd..10464289605 100644
--- a/bin/sh/show.c
+++ b/bin/sh/show.c
@@ -371,7 +371,6 @@ void
 opentrace(void)
 {
 	char s[100];
-	char *getenv();
 	int flags;
 
 	if (!debug)