Index: /trunk/src/VBox/HostDrivers/Support/SUPLibAll.cpp
===================================================================
--- /trunk/src/VBox/HostDrivers/Support/SUPLibAll.cpp	(revision 55245)
+++ /trunk/src/VBox/HostDrivers/Support/SUPLibAll.cpp	(revision 55246)
@@ -153,5 +153,5 @@
         int64_t iTscDelta = pGip->aCPUs[iGipCpu].i64TSCDelta;
         if (RT_LIKELY(iTscDelta != INT64_MAX))
-            return uTsc + iTscDelta;
+            return uTsc - iTscDelta;
 
 # ifdef IN_RING3