diff --git a/App/frequencies.c b/App/frequencies.c
index ac9953dd..1a71b950 100644
--- a/App/frequencies.c
+++ b/App/frequencies.c
@@ -164,7 +164,7 @@ int32_t TX_freq_check(const uint32_t Frequency)
     // otherwise return '-1'
 
     if (Frequency < frequencyBandTable[0].lower || Frequency > frequencyBandTable[BAND_N_ELEM - 1].upper)
-        return 1;  // not allowed outside this range
+        return -1;  // not allowed outside this range
 
     if (Frequency >= BX4819_band1.upper && Frequency < BX4819_band2.lower)
         return -1;  // BX chip does not work in this range