diff --git a/src/main/drivers/sonar_hcsr04.h b/src/main/drivers/sonar_hcsr04.h
index c04791e09d..fd01b4c490 100644
--- a/src/main/drivers/sonar_hcsr04.h
+++ b/src/main/drivers/sonar_hcsr04.h
@@ -31,8 +31,6 @@ typedef struct sonarRange_s {
     int16_t detectionConeExtendedDeciDegrees; // device spec is conservative, in practice have slightly larger detection cone
 } sonarRange_t;
 
-#define SONAR_GPIO GPIOB
-
 #define HCSR04_MAX_RANGE_CM 400 // 4m, from HC-SR04 spec sheet
 #define HCSR04_DETECTION_CONE_DECIDEGREES 300 // recommended cone angle30 degrees, from HC-SR04 spec sheet
 #define HCSR04_DETECTION_CONE_EXTENDED_DECIDEGREES 450 // in practice 45 degrees seems to work well