diff --git a/src/ol/index.js b/src/ol/index.js
index f2e44acc19..377d594239 100644
--- a/src/ol/index.js
+++ b/src/ol/index.js
@@ -41,7 +41,7 @@ let WEBGL_EXTENSIONS; // value is set below
 let HAS_WEBGL = false;
 
 
-if ('WebGLRenderingContext' in window) {
+if (typeof window !== 'undefined' && 'WebGLRenderingContext' in window) {
   try {
     const canvas = /** @type {HTMLCanvasElement} */
         (document.createElement('CANVAS'));