diff --git a/include/linux/slab.h b/include/linux/slab.h
index a015236cc572b8f11a52bcea9ebf9a23251be934..cebcd3833c767e4849a59eb29277eec0e73ec89d 100644
--- a/include/linux/slab.h
+++ b/include/linux/slab.h
@@ -82,8 +82,8 @@ static inline void *kmem_cache_alloc_node(struct kmem_cache *cachep,
  * to do various tricks to work around compiler limitations in order to
  * ensure proper constant folding.
  */
-#define KMALLOC_SHIFT_HIGH	((MAX_ORDER + PAGE_SHIFT) <= 25 ? \
-				(MAX_ORDER + PAGE_SHIFT) : 25)
+#define KMALLOC_SHIFT_HIGH	((MAX_ORDER + PAGE_SHIFT - 1) <= 25 ? \
+				(MAX_ORDER + PAGE_SHIFT - 1) : 25)
 
 #define KMALLOC_MAX_SIZE	(1UL << KMALLOC_SHIFT_HIGH)
 #define KMALLOC_MAX_ORDER	(KMALLOC_SHIFT_HIGH - PAGE_SHIFT)