diff --git a/scst/include/backport.h b/scst/include/backport.h
index 112c8dc98..989fc33b5 100644
--- a/scst/include/backport.h
+++ b/scst/include/backport.h
@@ -848,7 +848,9 @@ static inline void mempool_destroy_backport(mempool_t *pool)
 /* <linux/mm.h> */
 
 #if LINUX_VERSION_CODE < KERNEL_VERSION(4, 12, 0) &&	\
-	(!defined(RHEL_MAJOR) || RHEL_MAJOR -0 < 7)
+	(!defined(RHEL_MAJOR) || RHEL_MAJOR -0 < 7 ||	\
+	 (RHEL_MAJOR -0 == 7 && RHEL_MINOR -0 < 5)) &&	\
+	!defined(_COMPAT_LINUX_MM_H)
 /* See also commit a7c3e901a46f ("mm: introduce kv[mz]alloc helpers") # v4.12 */
 static inline void *kvmalloc_node(size_t size, gfp_t flags, int node)
 {