diff --git a/headers/os/drivers/KernelExport.h b/headers/os/drivers/KernelExport.h
index d6821324ff..69d2704970 100644
--- a/headers/os/drivers/KernelExport.h
+++ b/headers/os/drivers/KernelExport.h
@@ -126,6 +126,10 @@ extern long			get_memory_map(const void *buffer, ulong size,
 /* address specifications for mapping physical memory */
 #define	B_ANY_KERNEL_BLOCK_ADDRESS	(B_ANY_KERNEL_ADDRESS + 1)
 
+/* area protection flags for the kernel */
+#define B_KERNEL_READ_AREA			16
+#define B_KERNEL_WRITE_AREA			32
+
 /* call to map physical memory - typically used for memory-mapped i/o */
 
 extern area_id		map_physical_memory(const char *areaName, void *physicalAddress,