diff --git a/include/linux/pageblock-flags.h b/include/linux/pageblock-flags.h
index 96b623f..3619d52 100644
--- a/include/linux/pageblock-flags.h
+++ b/include/linux/pageblock-flags.h
@@ -31,6 +31,7 @@
 
 /* Bit indices that affect a whole block of pages */
 enum pageblock_bits {
+	PB_range(PB_migrate, 1), /* 1 bit required for migrate types */
 	NR_PAGEBLOCK_BITS
 };