diff --git a/sw/airborne/modules/computer_vision/opticflow/visual_estimator.c b/sw/airborne/modules/computer_vision/opticflow/visual_estimator.c
index 7b0288a44f..75654434e6 100644
--- a/sw/airborne/modules/computer_vision/opticflow/visual_estimator.c
+++ b/sw/airborne/modules/computer_vision/opticflow/visual_estimator.c
@@ -103,7 +103,7 @@ static void agl_cb(uint8_t sender_id, const float *distance);
 
 static void agl_cb(uint8_t sender_id __attribute__((unused)), const float *distance)
 {
-  if (distance > 0) {
+  if (*distance > 0) {
     estimator_agl = *distance;
   }
 }