diff --git a/src/webgl/webgl-texture.ts b/src/webgl/webgl-texture.ts
index 3f7186a..cfb40c9 100644
--- a/src/webgl/webgl-texture.ts
+++ b/src/webgl/webgl-texture.ts
@@ -163,6 +163,7 @@ export class WebGLCanvasTexture {
 
   dispose() {
     this.base = undefined;
+    this.canvas = undefined;
 
     if (this.gl != undefined) {
       const numTextureUnits = this.gl.getParameter(this.gl.MAX_TEXTURE_IMAGE_UNITS);