diff --git a/Runtime/SplineRoad.cs b/Runtime/SplineRoad.cs
index 878aee3..f9a3944 100644
--- a/Runtime/SplineRoad.cs
+++ b/Runtime/SplineRoad.cs
@@ -329,6 +329,7 @@ private void BuildMesh()
             m.SetTriangles(tris, 0);
             m.SetTriangles(trisB, 1);
             m.SetUVs(0, uvs);
+            m.RecalculateNormals();
             _meshFilter.sharedMesh = m;
         }
 
@@ -531,4 +532,4 @@ private void OnDrawGizmosSelected()
         }
 #endif
     }
-}
\ No newline at end of file
+}