diff --git a/jetty-websocket/websocket-api/src/main/java/org/eclipse/jetty/websocket/api/extensions/Frame.java b/jetty-websocket/websocket-api/src/main/java/org/eclipse/jetty/websocket/api/extensions/Frame.java
index d6aa16ea395..519e1bc2ed7 100644
--- a/jetty-websocket/websocket-api/src/main/java/org/eclipse/jetty/websocket/api/extensions/Frame.java
+++ b/jetty-websocket/websocket-api/src/main/java/org/eclipse/jetty/websocket/api/extensions/Frame.java
@@ -65,7 +65,7 @@ public interface Frame
 
         public boolean isData()
         {
-            return (opcode == TEXT.getOpCode()) | (opcode == BINARY.getOpCode());
+            return (opcode == TEXT.getOpCode()) || (opcode == BINARY.getOpCode());
         }
 
         public boolean isContinuation()