diff --git a/ArduCopter/GCS_Mavlink.pde b/ArduCopter/GCS_Mavlink.pde
index 83c67d999a..0841fcdf11 100644
--- a/ArduCopter/GCS_Mavlink.pde
+++ b/ArduCopter/GCS_Mavlink.pde
@@ -2127,7 +2127,8 @@ static void gcs_send_text_fmt(const prog_char_t *fmt, ...)
     fmtstr[i] = 0;
     pending_status.severity = (uint8_t)SEVERITY_LOW;
     va_start(arg_list, fmt);
-    vsnprintf((char *)pending_status.text, sizeof(pending_status.text), fmtstr, arg_list);
+    hal.util->vsnprintf((char *)pending_status.text,
+            sizeof(pending_status.text), fmtstr, arg_list);
     va_end(arg_list);
     mavlink_send_message(MAVLINK_COMM_0, MSG_STATUSTEXT, 0);
     if (gcs3.initialised) {