diff --git a/sys/src/cmd/chgrp.c b/sys/src/cmd/chgrp.c
index 398fddbc1..65d84b160 100644
--- a/sys/src/cmd/chgrp.c
+++ b/sys/src/cmd/chgrp.c
@@ -1,7 +1,6 @@
 #include <u.h>
 #include <libc.h>
 
-int	readgid(char*);
 int	uflag;
 
 void