diff --git a/radio/src/targets/tx15/hal.h b/radio/src/targets/tx15/hal.h
index a533c6b97..6dccf1624 100644
--- a/radio/src/targets/tx15/hal.h
+++ b/radio/src/targets/tx15/hal.h
@@ -81,9 +81,6 @@ TIM17:	ROTARY_ENCODER_TIMER
 // ADC
 #define ADC_VREF_PREC2                  330
 
-// Serial gimbal sync port
-#define HALL_SYNC                   GPIO_PIN(GPIOH, 11)
-
 #define USE_EXTI9_5_IRQ // used for I2C port extender interrupt
 #define EXTI9_5_IRQ_Priority 5
 
diff --git a/radio/src/targets/tx16smk3/hal.h b/radio/src/targets/tx16smk3/hal.h
index 7e50bff91..1a1675537 100644
--- a/radio/src/targets/tx16smk3/hal.h
+++ b/radio/src/targets/tx16smk3/hal.h
@@ -294,9 +294,6 @@ USART6: INTMODULE_USART
     0	     	/* lux sensor */ \
   }
 
-// Serial gimbal sync port
-#define HALL_SYNC                   GPIO_PIN(GPIOH, 11)
-
 #define USE_EXTI9_5_IRQ // used for I2C port extender interrupt
 #define EXTI9_5_IRQ_Priority 5