Index: kernel/arch/amd64/include/cpu.h
===================================================================
--- kernel/arch/amd64/include/cpu.h	(revision 1dbfe988113fb7d5276fcfd861f794b1971bb5bc)
+++ kernel/arch/amd64/include/cpu.h	(revision 81c0171eb0e748ba009fbf142c302f72f6d64807)
@@ -36,6 +36,7 @@
 #define KERN_amd64_CPU_H_
 
-#define RFLAGS_IF       (1 << 9)
-#define RFLAGS_RF       (1 << 16)
+#define RFLAGS_IF	(1 << 9)
+#define RFLAGS_DF	(1 << 10)
+#define RFLAGS_RF	(1 << 16)
 
 #define EFER_MSR_NUM    0xc0000080