diff --git a/Firmware/Inc/main.h b/Firmware/Inc/main.h
index 228c6018..a9650093 100644
--- a/Firmware/Inc/main.h
+++ b/Firmware/Inc/main.h
@@ -158,7 +158,7 @@
 #define CURRENT_MEAS_PERIOD ((float)(2*TIM_1_8_PERIOD_CLOCKS)/(float)TIM_1_8_CLOCK_HZ)
 #define CURRENT_MEAS_HZ (TIM_1_8_CLOCK_HZ/(2*TIM_1_8_PERIOD_CLOCKS))
 
-#if HW_VERSION_HIGH_VOLTAGE == true
+#ifdef HW_VERSION_HIGH_VOLTAGE
 #define VBUS_S_DIVIDER_RATIO 19.0f
 #else
 #define VBUS_S_DIVIDER_RATIO 11.0f