diff --git a/WHATS_NEW b/WHATS_NEW
index 9053a5c78..c6392b9e7 100644
--- a/WHATS_NEW
+++ b/WHATS_NEW
@@ -1,5 +1,6 @@
 Version 2.02.73 - 
 ================================
+  Fix data corruption bug in cluster mirrors.
   Require logical volume(s) to be explicitly named for lvconvert --merge.
   Avoid changing aligned pe_start as a side-effect of very verbose logging.
   Fix 'void*' arithmetic warnings in dbg_malloc.c.
diff --git a/daemons/cmirrord/functions.c b/daemons/cmirrord/functions.c
index 2ecd6b335..991762594 100644
--- a/daemons/cmirrord/functions.c
+++ b/daemons/cmirrord/functions.c
@@ -106,7 +106,7 @@ static DM_LIST_INIT(log_pending_list);
 
 static int log_test_bit(dm_bitset_t bs, int bit)
 {
-	return dm_bit(bs, bit);
+	return dm_bit(bs, bit) ? 1 : 0;
 }
 
 static void log_set_bit(struct log_c *lc, dm_bitset_t bs, int bit)