diff --git a/src/util/common-utils.js b/src/util/common-utils.js
index fd8f6ca5..06b96b60 100644
--- a/src/util/common-utils.js
+++ b/src/util/common-utils.js
@@ -113,7 +113,7 @@ export const calculateFlowDirection = (canvasAngle) => {
   return {
     down: -canvasAngle,
     up: 180 - canvasAngle,
-    left: 90 - canvasAngle,
-    right: -90 - canvasAngle,
+    left: 90 - canvasAngle < 180 ? 90 - canvasAngle : 90 - canvasAngle - 360,
+    right: -90 - canvasAngle < -180 ? -90 - canvasAngle + 360 : -90 - canvasAngle,
   }
 }