diff --git a/libxfs/xfs_alloc.c b/libxfs/xfs_alloc.c
index 2cc7561..7935123 100644
--- a/libxfs/xfs_alloc.c
+++ b/libxfs/xfs_alloc.c
@@ -3135,7 +3135,7 @@
 
 /*
  * Walk all the blocks in the AGFL.  The @walk_fn can return any negative
- * error code or XFS_BTREE_QUERY_RANGE_ABORT.
+ * error code or XFS_ITER_*.
  */
 int
 xfs_agfl_walk(
diff --git a/libxfs/xfs_btree.h b/libxfs/xfs_btree.h
index fcceb7c..80b7f9e 100644
--- a/libxfs/xfs_btree.h
+++ b/libxfs/xfs_btree.h
@@ -465,8 +465,8 @@
 unsigned long long xfs_btree_calc_size(uint *limits, unsigned long long len);
 
 /* return codes */
-#define XFS_BTREE_QUERY_RANGE_CONTINUE	0	/* keep iterating */
-#define XFS_BTREE_QUERY_RANGE_ABORT	1	/* stop iterating */
+#define XFS_BTREE_QUERY_RANGE_CONTINUE	(XFS_ITER_CONTINUE) /* keep iterating */
+#define XFS_BTREE_QUERY_RANGE_ABORT	(XFS_ITER_ABORT)    /* stop iterating */
 typedef int (*xfs_btree_query_range_fn)(struct xfs_btree_cur *cur,
 		union xfs_btree_rec *rec, void *priv);
 
diff --git a/libxfs/xfs_shared.h b/libxfs/xfs_shared.h
index c45acbd..e0641b7 100644
--- a/libxfs/xfs_shared.h
+++ b/libxfs/xfs_shared.h
@@ -177,4 +177,10 @@
 	unsigned int	agino_log;	/* #bits for agino in inum */
 };
 
+/* Keep iterating the data structure. */
+#define XFS_ITER_CONTINUE	(0)
+
+/* Stop iterating the data structure. */
+#define XFS_ITER_ABORT		(1)
+
 #endif /* __XFS_SHARED_H__ */