diff --git a/lib/boatData/GwBoatData.cpp b/lib/boatData/GwBoatData.cpp
index 91d1bc2..df61ddf 100644
--- a/lib/boatData/GwBoatData.cpp
+++ b/lib/boatData/GwBoatData.cpp
@@ -425,7 +425,7 @@ double formatWind(double cv)
 {
     double rt = formatCourse(cv);
     if (rt > 180)
-        rt = 180 - rt;
+        rt = -1 * (360 - rt);
     return rt;
 }
 double formatKnots(double cv)