diff --git a/mach/proto/top/top.c b/mach/proto/top/top.c
index 482a3cc08..ef7814ba9 100644
--- a/mach/proto/top/top.c
+++ b/mach/proto/top/top.c
@@ -17,7 +17,6 @@ extern instr_p gen_instr();
 extern char * malloc();
 extern char *strcat();
 extern char *strcpy();
-extern char *sprintf();
 extern char *strncpy();
 
 struct variable var[NRVARS+1];