diff --git a/lib/websocket.js b/lib/websocket.js
index 973f00c..ab3178b 100644
--- a/lib/websocket.js
+++ b/lib/websocket.js
@@ -243,7 +243,17 @@ var WebSocket = function(url, proto) {
 
                 assert.equal(mbOff, bufsBytes);
 
-                buf.copy(mb, mbOff, off, i);
+                // Don't call Buffer.copy() if we're coping 0 bytes. Rather
+                // than being a no-op, this will trigger a range violation on
+                // the destination.
+                if (i > 0) {
+                    buf.copy(mb, mbOff, off, i);
+                }
+
+                // We consumed all of the buffers that we'd been saving; clear
+                // things out
+                bufs = [];
+                bufsBytes = 0;
             }
 
             process.nextTick(function() {