diff --git a/WHATS_NEW_DM b/WHATS_NEW_DM
index 49a78121e..1c0843ea5 100644
--- a/WHATS_NEW_DM
+++ b/WHATS_NEW_DM
@@ -1,5 +1,6 @@
 Version 1.02.85 - 
 ===================================
+  Check for sprintf error when creating path for dm control node.
   When buffer for dm_get_library_version() is too small, return error code.
   Always reinitialize _name_mangling_mode in dm_lib_init().
   Add tracking flag about implicitly added devices into dm_tree.
diff --git a/libdm/ioctl/libdm-iface.c b/libdm/ioctl/libdm-iface.c
index 7b1fead8a..25f1d90e9 100644
--- a/libdm/ioctl/libdm-iface.c
+++ b/libdm/ioctl/libdm-iface.c
@@ -380,7 +380,8 @@ static int _open_control(void)
 	if (!_uname())
 		return 0;
 
-	snprintf(control, sizeof(control), "%s/%s", dm_dir(), DM_CONTROL_NODE);
+	if (dm_snprintf(control, sizeof(control), "%s/%s", dm_dir(), DM_CONTROL_NODE) < 0)
+		goto_bad;
 
 	/*
 	 * Prior to 2.6.36 the minor number should be looked up in /proc.