diff --git a/kern/arch/x86/ros/mmu.h b/kern/arch/x86/ros/mmu.h
index 6e423ad..2c2fef2 100644
--- a/kern/arch/x86/ros/mmu.h
+++ b/kern/arch/x86/ros/mmu.h
@@ -53,6 +53,7 @@
 #define FL_IF		0x00000200	// Interrupt Flag
 #define FL_DF		0x00000400	// Direction Flag
 #define FL_OF		0x00000800	// Overflow Flag
+#define FL_STATUS (FL_CF | FL_PF | FL_AF | FL_ZF | FL_SF | FL_OF)
 #define FL_IOPL_MASK	0x00003000	// I/O Privilege Level bitmask
 #define FL_IOPL_0	0x00000000	//   IOPL == 0
 #define FL_IOPL_1	0x00001000	//   IOPL == 1