Index: /trunk/src/VBox/Additions/common/VBoxGuest/VBoxGuest.cpp
===================================================================
--- /trunk/src/VBox/Additions/common/VBoxGuest/VBoxGuest.cpp	(revision 42365)
+++ /trunk/src/VBox/Additions/common/VBoxGuest/VBoxGuest.cpp	(revision 42366)
@@ -90,4 +90,13 @@
     /* VirtioNet */
     (PFNRT)RTRandBytes,
+    /* RTSemMutex* */
+    (PFNRT)RTSemMutexCreate,
+    (PFNRT)RTSemMutexDestroy,
+    (PFNRT)RTSemMutexRequest,
+    (PFNRT)RTSemMutexRequestNoResume,
+    (PFNRT)RTSemMutexRequestDebug,
+    (PFNRT)RTSemMutexRequestNoResumeDebug,
+    (PFNRT)RTSemMutexRelease,
+    (PFNRT)RTSemMutexIsOwned,
     NULL
 };