Index: /trunk/src/VBox/Runtime/r3/win/semmutex-win.cpp
===================================================================
--- /trunk/src/VBox/Runtime/r3/win/semmutex-win.cpp	(revision 25657)
+++ /trunk/src/VBox/Runtime/r3/win/semmutex-win.cpp	(revision 25658)
@@ -305,5 +305,5 @@
     RTNATIVETHREAD hNativeOwner;
     ASMAtomicReadHandle(&pThis->hNativeOwner, &hNativeOwner);
-    return hNativeOwner == NIL_RTNATIVETHREAD;
-}
-
+    return hNativeOwner != NIL_RTNATIVETHREAD;
+}
+