diff --git a/WHATS_NEW b/WHATS_NEW
index 6fd7414e1..169beee2e 100644
--- a/WHATS_NEW
+++ b/WHATS_NEW
@@ -1,5 +1,6 @@
 Version 2.02.89 - 
 ==================================
+  Unlock memory before writing metadata.
   Add query before removing snapshots when inactive snapshot origin is removed.
   Allow changing availability state of snapshots.
   Skip non-virtual snapshots for availability change for lvchange with vg name.
diff --git a/lib/metadata/metadata.c b/lib/metadata/metadata.c
index 4037c0e6f..7ab06c0bd 100644
--- a/lib/metadata/metadata.c
+++ b/lib/metadata/metadata.c
@@ -2573,6 +2573,12 @@ int vg_write(struct volume_group *vg)
 		return 0;
 	}
 
+	if (critical_section())
+		log_error(INTERNAL_ERROR
+			  "Writing metadata in critical section.");
+
+	/* Unlock memory if possible */
+	memlock_unlock(vg->cmd);
 	vg->seqno++;
 
         dm_list_iterate_items(pv_to_create, &vg->pvs_to_create) {