diff --git a/src/renderer/webgl/shaders/TilemapGPULayer-vert.js b/src/renderer/webgl/shaders/TilemapGPULayer-vert.js
index 5ec10cc065..59a8431224 100644
--- a/src/renderer/webgl/shaders/TilemapGPULayer-vert.js
+++ b/src/renderer/webgl/shaders/TilemapGPULayer-vert.js
@@ -21,7 +21,7 @@ module.exports = [
     '{',
     '    gl_Position = uProjectionMatrix * vec4(inPosition, 1.0, 1.0);',
     '    outTexCoord = inTexCoord;',
-    '    outTileStride = uTileWidthHeightMarginSpacing.xy + uTileWidthHeightMarginSpacing.zz;',
+    '    outTileStride = uTileWidthHeightMarginSpacing.xy + uTileWidthHeightMarginSpacing.ww;',
     '    #pragma phaserTemplate(vertexProcess)',
     '}',
 ].join('\n');
diff --git a/src/renderer/webgl/shaders/src/TilemapGPULayer.vert b/src/renderer/webgl/shaders/src/TilemapGPULayer.vert
index 8a436a1c55..ba963cdf68 100644
--- a/src/renderer/webgl/shaders/src/TilemapGPULayer.vert
+++ b/src/renderer/webgl/shaders/src/TilemapGPULayer.vert
@@ -31,7 +31,7 @@ void main ()
     gl_Position = uProjectionMatrix * vec4(inPosition, 1.0, 1.0);
 
     outTexCoord = inTexCoord;
-    outTileStride = uTileWidthHeightMarginSpacing.xy + uTileWidthHeightMarginSpacing.zz;
+    outTileStride = uTileWidthHeightMarginSpacing.xy + uTileWidthHeightMarginSpacing.ww;
 
     #pragma phaserTemplate(vertexProcess)
 }