diff --git a/lib/metadata/metadata-exported.h b/lib/metadata/metadata-exported.h
index 5ca8f7cfb..3d5e3ce72 100644
--- a/lib/metadata/metadata-exported.h
+++ b/lib/metadata/metadata-exported.h
@@ -433,12 +433,14 @@ struct pv_segment {
  */
 
 struct format_instance {
-	unsigned ref_count;	/* Refs to this fid from VG and PV structs */
 	struct dm_pool *mem;
 
-	uint32_t type;
 	const struct format_type *fmt;
 
+	unsigned ref_count;	/* Refs to this fid from VG and PV structs */
+
+	uint32_t type;
+
 	/*
 	 * Each mda in a vg is on exactly one of the below lists.
 	 * MDAs on the 'in_use' list will be read from / written to