Index: /trunk/src/VBox/Devices/Input/PS2M.cpp
===================================================================
--- /trunk/src/VBox/Devices/Input/PS2M.cpp	(revision 53321)
+++ /trunk/src/VBox/Devices/Input/PS2M.cpp	(revision 53322)
@@ -540,6 +540,6 @@
 
 #ifndef IN_RING3
-    /* Reset and Set Default commands must be run in R3. */
-    if (cmd == ACMD_RESET || cmd == ACMD_SET_DEFAULT)
+    /* Reset, Enable, and Set Default commands must be run in R3. */
+    if (cmd == ACMD_RESET || cmd == ACMD_ENABLE || cmd == ACMD_SET_DEFAULT)
         return VINF_IOM_R3_IOPORT_WRITE;
 #endif