diff --git a/src/drivers/drv_px4flow.h b/src/drivers/drv_px4flow.h
index 63cfe9816a..90bad2f25d 100644
--- a/src/drivers/drv_px4flow.h
+++ b/src/drivers/drv_px4flow.h
@@ -46,11 +46,6 @@
 
 #define PX4FLOW0_DEVICE_PATH	"/dev/px4flow0"
 
-/*
- * ObjDev tag for px4flow data.
- */
-ORB_DECLARE(optical_flow);
-
 /*
  * ioctl() definitions
  *