diff --git a/kenwood/kenwood.c b/kenwood/kenwood.c
index 81753ce13..7f502cc03 100644
--- a/kenwood/kenwood.c
+++ b/kenwood/kenwood.c
@@ -1075,7 +1075,7 @@ int kenwood_set_freq(RIG *rig, vfo_t vfo, freq_t freq)
     rig_debug(RIG_DEBUG_ERR, "%s: unsupported VFO %d\n", __func__, vfo);
     return -RIG_EINVAL;
   }
-  sprintf(freqbuf, "F%c%011ld", vfo_letter, (long)freq);
+  sprintf(freqbuf, "F%c%011lld", vfo_letter, (long long)freq);
 
   int err = kenwood_transaction(rig, freqbuf, NULL, 0);
 
diff --git a/yaesu/newcat.c b/yaesu/newcat.c
index 303180f49..c9cff0346 100644
--- a/yaesu/newcat.c
+++ b/yaesu/newcat.c
@@ -441,7 +441,7 @@ int newcat_set_freq(RIG *rig, vfo_t vfo, freq_t freq) {
     int width_frequency = priv->width_frequency;
     if (width_frequency == 0) width_frequency = 8; // default to 8
 
-    snprintf(priv->cmd_str, sizeof(priv->cmd_str), "F%c%0*d%c", c, width_frequency, (int)freq, cat_term);
+    snprintf(priv->cmd_str, sizeof(priv->cmd_str), "F%c%0*lld%c", c, width_frequency, (long long)freq, cat_term);
     rig_debug(RIG_DEBUG_TRACE, "%s:%d cmd_str = %s\n", __func__, __LINE__, priv->cmd_str);
     if (RIG_OK != (err = newcat_set_cmd(rig)))
       {