diff --git a/yaesu/ft600.c b/yaesu/ft600.c
index 34a79d0e7..90504c10e 100644
--- a/yaesu/ft600.c
+++ b/yaesu/ft600.c
@@ -42,7 +42,7 @@
 #include "bandplan.h"
 
 /* prototypes */
-static int ft600_send_priv_cmd(RIG *rig, unsigned char ci);
+static int ft600_send_priv_cmd(RIG *rig, unsigned char cmd_index);
 
 static const yaesu_cmd_set_t ncmd[] =
 {