diff --git a/src/createFFmpeg.js b/src/createFFmpeg.js
index c5425ce..61753ff 100644
--- a/src/createFFmpeg.js
+++ b/src/createFFmpeg.js
@@ -75,17 +75,14 @@ module.exports = (_options = {}) => {
          * as we are using blob URL instead of original URL to avoid cross origin issues.
          */
         locateFile: (path, prefix) => {
-          if (typeof window !== 'undefined') {
-            if (typeof wasmPath !== 'undefined'
-              && path.endsWith('ffmpeg-core.wasm')) {
-              return wasmPath;
-            }
-            if (typeof workerPath !== 'undefined'
-              && path.endsWith('ffmpeg-core.worker.js')) {
-              return workerPath;
-            }
+          if (typeof wasmPath !== 'undefined'
+            && path.endsWith('ffmpeg-core.wasm')) {
+            return wasmPath;
+          }
+          if (typeof workerPath !== 'undefined'
+            && path.endsWith('ffmpeg-core.worker.js')) {
+            return workerPath;
           }
-          return prefix + path;
         },
       });
       ffmpeg = Core.cwrap('proxy_main', 'number', ['number', 'number']);