diff --git a/lib/make/webgl.js b/lib/make/webgl.js
index b3dc18f..c84f6ef 100644
--- a/lib/make/webgl.js
+++ b/lib/make/webgl.js
@@ -816,7 +816,9 @@ class webgl extends make {
     if (pattern) {
       let candidates = []
       extensions.forEach((ext) => ext.includes(pattern) ? candidates.push(ext) : '')
-      return random.item(candidates)
+      if (candidates.length >= 0) {
+        return random.item(candidates)
+      }
     }
 
     return random.item(extensions)