diff --git a/ccnode/libvirtwrapper.py b/ccnode/libvirtwrapper.py
index 5cdaaee60596ebf74be20afbb8125fd77e4838a6..ce0e3a84a959e04c845470bc39df1aa77799d5eb 100644
--- a/ccnode/libvirtwrapper.py
+++ b/ccnode/libvirtwrapper.py
@@ -402,7 +402,7 @@ class LibvirtHVStorage(HVStorage):
             "vol_size" : space * GIGABYTE_DIV,
             }
         try:
-            pool.createXML(xml_desc, 0);
+            self._pools[pool].createXML(xml_desc, 0);
         except libvirt.libvirtError as e:
             raise StorageError("Failed to create the volume (%s)" % e)
 
@@ -436,7 +436,7 @@ class LibvirtHVStorage(HVStorage):
         Tries to find a suitable chunk of space for volume allocation.
 
         :param new_space: a space size in gigabytes
-        :type new_space: :class:`str`
+        :type new_space: :class:`int`
         :return: a :class:`tuple` of best location or :class:`False` if no
             pool is suitable
         '''