diff --git a/Util/UUID.cpp.in b/Util/UUID.cpp.in
index 9ba29dc15..cd3bc38b1 100644
--- a/Util/UUID.cpp.in
+++ b/Util/UUID.cpp.in
@@ -28,6 +28,9 @@ or see http://www.gnu.org/licenses/agpl.txt.
 #cmakedefine MD5OBJECTS "${MD5OBJECTS}"
 
 UUID::UUID() : magic_number(1297240911) {
+    md5_prepare[32] = md5_tree[32] = md5_nodeinfo[32] = md5_graph[32] =
+        md5_objects[32] = '\0';
+
  	boost::uuids::name_generator gen(named_uuid);
  	std::string temp_string(__DATE__);
  	temp_string += __TIME__;