diff --git a/README.md b/README.md
index db2fae7..bc023e6 100644
--- a/README.md
+++ b/README.md
@@ -253,7 +253,7 @@ optional arguments:
 Shows a report of the size of all data objects in a (set of) collections.
 
 ```
-usage: yreport_collectionsize [-y {1.7,1.8,1.9}] [--help] [-h] [-r] [-R]
+usage: yreport_collectionsize [-y {1.7,1.8,1.9}] [--help] [-q] [-h] [-r] [-R]
                               [-g GROUP_BY]
                               (-c COLLECTION | -H | -C COMMUNITY)
 
@@ -263,6 +263,8 @@ optional arguments:
   -y {1.7,1.8,1.9}, --yoda-version {1.7,1.8,1.9}
                         Override Yoda version on the server
   --help                show help information
+  -q, --quasi-xml       Enable Quasi-XML parser in order to be able to parse
+                        characters not supported by regular XML parser
   -h, --human-readable  Show sizes in human readable format, e.g. 1.0MB
                         instead of 1000000
   -r, --count-all-replicas
@@ -290,7 +292,6 @@ optional arguments:
                         Show total size of data objects in each research and
                         vault collection in a Yoda community. Note: you will
                         only see the collections you have access to.
-
 ```
 
 ### yreport\_dataobjectspercollection
diff --git a/yclienttools/reportsize.py b/yclienttools/reportsize.py
index 2c9adf6..f513658 100644
--- a/yclienttools/reportsize.py
+++ b/yclienttools/reportsize.py
@@ -4,8 +4,9 @@
 import humanize
 import csv
 import sys
+from irods.message import (XML_Parser_Type, ET)
 from irods.models import Collection, User, UserMeta
-from yclienttools import session, common_args, exceptions
+from yclienttools import session as s, common_args, common_config, exceptions
 from yclienttools.common_queries import collection_exists, get_collection_size
 from yclienttools.options import GroupByOption
 
@@ -14,9 +15,12 @@ def entry():
     '''Entry point'''
     try:
         args = _get_args()
-        s = session.setup_session(args.yoda_version)
-        report_size(args, s)
-        s.cleanup()
+        yoda_version = args.yoda_version if args.yoda_version is not None else common_config.get_default_yoda_version()
+        session = s.setup_session(yoda_version)
+        if args.quasi_xml:
+            ET(XML_Parser_Type.QUASI_XML, session.server_version)
+        report_size(args, session)
+        session.cleanup()
     except KeyboardInterrupt:
         print("Script interrupted by user.\n", file=sys.stderr)
 
@@ -35,6 +39,8 @@ def _get_args():
     parser = argparse.ArgumentParser(description=__doc__, add_help=False)
     common_args.add_default_args(parser)
     parser.add_argument('--help', action='help', help='show help information')
+    parser.add_argument("-q", "--quasi-xml", default=False, action='store_true',
+                        help='Enable Quasi-XML parser in order to be able to parse characters not supported by regular XML parser')
     parser.add_argument('-h', '--human-readable', action='store_true', default=False,
                         help="Show sizes in human readable format, e.g. 1.0MB instead of 1000000")
     parser.add_argument("-r", '--count-all-replicas', action='store_true', default=False,