diff --git a/win/rfb_win32/CPointer.cxx b/win/rfb_win32/CPointer.cxx
index 2e9065f..5a5894b 100644
--- a/win/rfb_win32/CPointer.cxx
+++ b/win/rfb_win32/CPointer.cxx
@@ -172,7 +172,7 @@
       intervalTimer.stop();
     }
 
-  } else if (timerId = threeTimer.getId()) {
+  } else if (timerId == threeTimer.getId()) {
     // 3-Button emulation timer has expired - send what we've got
     vlog.debug("emulate3: timeout");
     threeTimer.stop();