diff --git a/Controllers/ASRockPolychromeSMBusController/RGBController_ASRockPolychromeSMBus.cpp b/Controllers/ASRockPolychromeSMBusController/RGBController_ASRockPolychromeSMBus.cpp
index fff7602fd..ab26bb50b 100644
--- a/Controllers/ASRockPolychromeSMBusController/RGBController_ASRockPolychromeSMBus.cpp
+++ b/Controllers/ASRockPolychromeSMBusController/RGBController_ASRockPolychromeSMBus.cpp
@@ -628,7 +628,7 @@ void RGBController_Polychrome::DeviceUpdateMode()
 {
     if(polychrome->GetASRockType() == ASROCK_TYPE_POLYCHROME_V1)
     {
-        for(unsigned int led_idx = 0; led_idx <= leds.size(); led_idx++)
+        for(unsigned int led_idx = 0; led_idx < leds.size(); led_idx++)
         {
             polychrome->SetMode(led_idx, modes[active_mode].value, modes[active_mode].speed);
         }