diff --git a/src/DIRAC/Resources/Catalog/FCConditionParser.py b/src/DIRAC/Resources/Catalog/FCConditionParser.py
index 4b2c607b511..137299ac7b4 100644
--- a/src/DIRAC/Resources/Catalog/FCConditionParser.py
+++ b/src/DIRAC/Resources/Catalog/FCConditionParser.py
@@ -191,7 +191,7 @@ def __init__(self, vo=None, ro_methods=None):
         """
 
         # Whenever we parse text matching the __pluginOperand grammar, create a PluginOperand object
-        self.__pluginOperand.setParseAction(lambda tokens: self.PluginOperand(tokens))
+        self.__pluginOperand.set_parse_action(lambda tokens: self.PluginOperand(tokens))
 
         self.opHelper = Operations(vo=vo)