Index: /trunk/include/VBox/x86.h
===================================================================
--- /trunk/include/VBox/x86.h	(revision 36792)
+++ /trunk/include/VBox/x86.h	(revision 36793)
@@ -151,4 +151,6 @@
 /** Bit 0 - CF - Carry flag - Status flag. */
 #define X86_EFL_CF          RT_BIT(0)
+/** Bit 1 - Reserved, reads as 1. */
+#define X86_EFL_1           RT_BIT(1)
 /** Bit 2 - PF - Parity flag - Status flag. */
 #define X86_EFL_PF          RT_BIT(2)