diff --git a/tasmota/xdrv_27_shutter.ino b/tasmota/xdrv_27_shutter.ino
index 4e0f02945..331678eb9 100644
--- a/tasmota/xdrv_27_shutter.ino
+++ b/tasmota/xdrv_27_shutter.ino
@@ -161,7 +161,7 @@ uint8_t ShutterRealToPercentPosition(int32_t realpos, uint32_t index)
         break;
       }
     }
-    return realpercent;
+    return (int16_t)realpercent < 0 ? 0 : realpercent;
   }
 }