diff --git a/examples/layer-browser/src/data-samples.js b/examples/layer-browser/src/data-samples.js
index 4498237a701..adaca69d38e 100644
--- a/examples/layer-browser/src/data-samples.js
+++ b/examples/layer-browser/src/data-samples.js
@@ -104,9 +104,11 @@ export const zigzag = [
       ])
   },
   {
+    // A-B-A
     path: [
       [positionOrigin[0] - 0.005, positionOrigin[1] + 0.005],
-      [positionOrigin[0] - 0.005, positionOrigin[1] - 0.005]
+      [positionOrigin[0] - 0.005, positionOrigin[1] - 0.005],
+      [positionOrigin[0] - 0.005, positionOrigin[1] + 0.005]
     ]
   }
 ];
diff --git a/modules/layers/src/path-layer/path-layer-vertex.glsl.js b/modules/layers/src/path-layer/path-layer-vertex.glsl.js
index 76738bf0007..7e81f47177e 100644
--- a/modules/layers/src/path-layer/path-layer-vertex.glsl.js
+++ b/modules/layers/src/path-layer/path-layer-vertex.glsl.js
@@ -97,7 +97,7 @@ vec3 lineJoin(
   float cosHalfA = abs(dot(dirA, miterVec));
 
   // -1: right, 1: left
-  float turnDirection = flipIfTrue(dirA.x * dirB.y > dirA.y * dirB.x);
+  float turnDirection = flipIfTrue(dirA.x * dirB.y >= dirA.y * dirB.x);
 
   // relative position to the corner:
   // -1: inside (smaller side of the angle)
diff --git a/test/render/golden-images/path-lnglat.png b/test/render/golden-images/path-lnglat.png
index b23e3a3a6c2..6886849642f 100644
Binary files a/test/render/golden-images/path-lnglat.png and b/test/render/golden-images/path-lnglat.png differ
diff --git a/test/render/golden-images/path-rounded.png b/test/render/golden-images/path-rounded.png
index 959a980bc0c..72e6bcae7e1 100644
Binary files a/test/render/golden-images/path-rounded.png and b/test/render/golden-images/path-rounded.png differ