diff --git a/src/ws/decoder.rs b/src/ws/decoder.rs
index 702681e..cce8f44 100644
--- a/src/ws/decoder.rs
+++ b/src/ws/decoder.rs
@@ -124,7 +124,7 @@ impl Decoder {
                             protocol::op::CONTINUATION_FRAME => WebsocketFrame::Continuation(self.fin, payload),
                             protocol::op::PING => WebsocketFrame::Ping(payload),
                             protocol::op::CONNECTION_CLOSE => WebsocketFrame::Close(payload),
-                            _ => return Err(Error::Protocol("unknown op_code")),
+                            _ => WebsocketFrame::Unknown(self.op_code, payload),
                         };
                         self.decode_state = DecodeState::ReadingHeader;
                         return Ok(Some(frame));
diff --git a/src/ws/mod.rs b/src/ws/mod.rs
index b6835fc..d7e8002 100644
--- a/src/ws/mod.rs
+++ b/src/ws/mod.rs
@@ -94,6 +94,9 @@ pub enum WebsocketFrame {
     /// Server has sent close frame. The websocket will be closed as a result. This frame is not
     /// exposed to the user.
     Close(&'static [u8]),
+    /// Server has sent an opcode that boomnet does not support. It is up to the user to handle the
+    /// outcome of an Unknown opcode
+    Unknown(u8, &'static [u8]),
 }
 
 /// Websocket client that owns underlying stream.