diff --git a/scst/include/scst_const.h b/scst/include/scst_const.h
index c0d32480b..d717cc39b 100644
--- a/scst/include/scst_const.h
+++ b/scst/include/scst_const.h
@@ -276,11 +276,13 @@ enum scst_cdb_flags {
 #define INIT_ELEMENT_STATUS         0x07
 #define INIT_ELEMENT_STATUS_RANGE   0x37
 #define PREVENT_ALLOW_MEDIUM        0x1E
-#if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 38)
+#if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 38) \
+	&& (!defined(RHEL_MAJOR) || RHEL_MAJOR -0 <= 5)
 #define READ_ATTRIBUTE              0x8C
 #endif
 #define REQUEST_VOLUME_ADDRESS      0xB5
-#if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 38)
+#if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 38) \
+	&& (!defined(RHEL_MAJOR) || RHEL_MAJOR -0 <= 5)
 #define WRITE_ATTRIBUTE             0x8D
 #endif
 #define WRITE_VERIFY_16             0x8E