diff --git a/App/driver/bk1080.c b/App/driver/bk1080.c
index d8ae2643..9f8376b1 100644
--- a/App/driver/bk1080.c
+++ b/App/driver/bk1080.c
@@ -134,14 +134,13 @@ void BK1080_GetFrequencyDeviation(uint16_t Frequency)
 
 uint16_t BK1080_GetFreqLoLimit(uint8_t band)
 {
-    uint16_t lim[] = {875, 760, 760, 640};
+    static const uint16_t lim[] = {875, 760, 760, 640};
     return lim[band % 4];
 }
 
 uint16_t BK1080_GetFreqHiLimit(uint8_t band)
 {
-    band %= 4;
-    uint16_t lim[] = {1080, 1080, 900, 760};
+    static const uint16_t lim[] = {1080, 1080, 900, 760};
     return lim[band % 4];
 }