diff --git a/WHATS_NEW_DM b/WHATS_NEW_DM
index 0f0880661..59f544d61 100644
--- a/WHATS_NEW_DM
+++ b/WHATS_NEW_DM
@@ -1,5 +1,7 @@
 Version 1.02.64 - 
 ===================================
+  Use dm_snprintf() to fix signess warning in dm_set_dev_dir().
+  Use unsigned loop counter to fix signess warning in _other_node_ops().
   Fix const cast in dmsetup calls of dm_report_field_string().
   Streamline /dev/mapper/control node code for common cases.
   Use hard-coded dm control node device number for 2.6.36 kernels and above.
diff --git a/libdm/libdm-common.c b/libdm/libdm-common.c
index 7cce3a7a9..1ae1027c8 100644
--- a/libdm/libdm-common.c
+++ b/libdm/libdm-common.c
@@ -794,7 +794,7 @@ static void _del_node_op(struct node_op_parms *nop)
 /* Check if there is other the type of node operation stacked */
 static int _other_node_ops(node_op_t type)
 {
-	int i;
+	unsigned i;
 
 	for (i = 0; i < NUM_NODES; i++)
 		if (type != i && _count_node_ops[i])
@@ -958,8 +958,7 @@ int dm_set_dev_dir(const char *dev_dir)
 	len = strlen(dev_dir);
 	slash = dev_dir[len-1] == '/' ? "" : "/";
 
-	if (snprintf(_dm_dir, sizeof _dm_dir, "%s%s%s", dev_dir, slash, DM_DIR)
-	    >= sizeof _dm_dir) {
+	if (dm_snprintf(_dm_dir, sizeof _dm_dir, "%s%s%s", dev_dir, slash, DM_DIR) < 0) {
 		log_debug("Invalid dev_dir value, %s: name too long.", dev_dir);
 		return 0;
 	}