diff --git a/WHATS_NEW_DM b/WHATS_NEW_DM
index 5f22b63da..ee3e69852 100644
--- a/WHATS_NEW_DM
+++ b/WHATS_NEW_DM
@@ -1,5 +1,6 @@
 Version 1.02.47 -
 =================================
+  Simplify dm_bitset_create.
   Speed up dm_bit_get_next with ffs().
 
 Version 1.02.46 - 14th April 2010
diff --git a/libdm/datastruct/bitset.c b/libdm/datastruct/bitset.c
index e8bec2ab7..bb16adda6 100644
--- a/libdm/datastruct/bitset.c
+++ b/libdm/datastruct/bitset.c
@@ -27,7 +27,7 @@ dm_bitset_t dm_bitset_create(struct dm_pool *mem, unsigned num_bits)
 	if (mem)
 		bs = dm_pool_zalloc(mem, size);
 	else if ((bs = dm_malloc(size)))
-		memset(mem, 0, size);
+		memset(bs, 0, size);
 
 	if (!bs)
 		return NULL;