diff --git a/rigs/icom/icom.c b/rigs/icom/icom.c
index 7d24c0cc6..c4d80151f 100644
--- a/rigs/icom/icom.c
+++ b/rigs/icom/icom.c
@@ -7399,13 +7399,6 @@ int icom_get_raw_buf(RIG *rig, int cmd, int subcmd, int subcmdbuflen,
         RETURNFUNC(-RIG_ETIMEOUT);
     }
 
-    if (ackbuf[0] != ACK && ackbuf[0] != cmd)
-    {
-        rig_debug(RIG_DEBUG_ERR, "%s: ack NG (%#.2x), len=%d\n", __func__,
-                  ackbuf[0], ack_len);
-        RETURNFUNC(-RIG_ERJCTED);
-    }
-
     rig_debug(RIG_DEBUG_TRACE, "%s: %d\n", __func__, ack_len);
 
     if (*reslen < ack_len || res == NULL)
diff --git a/rigs/icom/icom.h b/rigs/icom/icom.h
index 547d8bc60..c3959eaeb 100644
--- a/rigs/icom/icom.h
+++ b/rigs/icom/icom.h
@@ -30,7 +30,7 @@
 #include <sys/time.h>
 #endif
 
-#define BACKEND_VER "20210314"
+#define BACKEND_VER "20210316"
 
 /*
  * defines used by comp_cal_str in rig.c