diff --git a/account.py b/account.py
index 91d4620d71..46e871342b 100644
--- a/account.py
+++ b/account.py
@@ -1762,7 +1762,7 @@ class ThirdPartyBalance(Report):
         context['fiscalyear'] = datas['form']['fiscalyear']
         line_query, _ = move_line_obj.query_get(cursor, user, context=context)
         if datas['form']['posted']:
-            posted_clause = "and m.state = 'posted' "
+            posted_clause = "AND m.state = 'posted' "
         else:
             posted_clause = ""