diff --git a/ArduSub/commands_logic.cpp b/ArduSub/commands_logic.cpp
index bc97203b5c..007cecf79f 100644
--- a/ArduSub/commands_logic.cpp
+++ b/ArduSub/commands_logic.cpp
@@ -789,7 +789,7 @@ bool Sub::verify_yaw()
     }
 
     // check if we are within 2 degrees of the target heading
-    return (labsf(wrap_180_cd(ahrs.yaw_sensor-yaw_look_at_heading)) <= 200);
+    return (fabsf(wrap_180_cd(ahrs.yaw_sensor-yaw_look_at_heading)) <= 200);
 }
 
 /********************************************************************************/