diff --git a/ixwebsocket/IXSocket.cpp b/ixwebsocket/IXSocket.cpp
index e855f125..e2794229 100644
--- a/ixwebsocket/IXSocket.cpp
+++ b/ixwebsocket/IXSocket.cpp
@@ -129,7 +129,7 @@ namespace ix
     }
 
     // Wake up from poll/select by writing to the pipe which is watched by select
-    bool Socket::wakeUpFromPoll(uint64_t wakeUpCode)
+    bool Socket::wakeUpFromPoll(uint8_t wakeUpCode)
     {
         return _selectInterrupt->notify(wakeUpCode);
     }
diff --git a/ixwebsocket/IXSocket.h b/ixwebsocket/IXSocket.h
index e2c0da5e..288ac4d2 100644
--- a/ixwebsocket/IXSocket.h
+++ b/ixwebsocket/IXSocket.h
@@ -57,7 +57,7 @@ namespace ix
 
         // Functions to check whether there is activity on the socket
         PollResultType poll(int timeoutMs = kDefaultPollTimeout);
-        bool wakeUpFromPoll(uint64_t wakeUpCode);
+        bool wakeUpFromPoll(uint8_t wakeUpCode);
 
         PollResultType isReadyToWrite(int timeoutMs);
         PollResultType isReadyToRead(int timeoutMs);