diff --git a/src/client/graphics/layers/StructureDrawingUtils.ts b/src/client/graphics/layers/StructureDrawingUtils.ts
index 9c3eb6ce5..1ccad7c2f 100644
--- a/src/client/graphics/layers/StructureDrawingUtils.ts
+++ b/src/client/graphics/layers/StructureDrawingUtils.ts
@@ -89,6 +89,10 @@ export class SpriteFactory {
     unitType: UnitType,
   ) {
     const image = new Image();
+    // crossOrigin must be set before src so the fetch is CORS-checked.
+    // Without this, an icon served from CDN_BASE taints structureCanvas
+    // and PIXI.Texture.from rejects the upload to WebGL.
+    image.crossOrigin = "anonymous";
     image.src = unitInfo.iconPath;
     image.onload = () => {
       unitInfo.image = image;
diff --git a/src/client/graphics/layers/StructureLayer.ts b/src/client/graphics/layers/StructureLayer.ts
index 5bc165b92..f26a7dfbd 100644
--- a/src/client/graphics/layers/StructureLayer.ts
+++ b/src/client/graphics/layers/StructureLayer.ts
@@ -87,6 +87,10 @@ export class StructureLayer implements Layer {
 
   private loadIcon(unitType: string, config: UnitRenderConfig) {
     const image = new Image();
+    // crossOrigin must be set before src so the fetch is CORS-checked.
+    // Without this, an icon served from CDN_BASE taints any canvas/texture
+    // it's drawn into, and WebGL refuses to upload it via texImage2D.
+    image.crossOrigin = "anonymous";
     image.src = config.icon;
     image.onload = () => {
       this.unitIcons.set(unitType, image);