1 files changed, 9 insertions, 3 deletions
diff --git a/lib/stream.js b/lib/stream.js
index 9c1ba986d0..0dd44e3a61 100644
--- a/lib/stream.js
+++ b/lib/stream.js
@@ -38,10 +38,16 @@ Stream.Stream = Stream;
 
 // Internal utilities
 try {
-  Stream._isUint8Array = process.binding('util').isUint8Array;
+  Stream._isUint8Array = require('internal/util/types').isUint8Array;
 } catch (e) {
-  // This throws for Node < 4.2.0 because there’s no util binding and
-  // returns undefined for Node < 7.4.0.
+  // Throws for code outside of Node.js core.
+
+  try {
+    Stream._isUint8Array = process.binding('util').isUint8Array;
+  } catch (e) {
+    // This throws for Node < 4.2.0 because there’s no util binding and
+    // returns undefined for Node < 7.4.0.
+  }
 }
 
 if (!Stream._isUint8Array) {