diff --git a/Reconstruction/Jet/JetRecConfig/python/JetRecConfig.py b/Reconstruction/Jet/JetRecConfig/python/JetRecConfig.py
index 6a2483d4dd503c00d6e86936fb4d9e9291508812..fdabc6f4b0afd894ec3c30056ee60c0a1f5165d1 100644
--- a/Reconstruction/Jet/JetRecConfig/python/JetRecConfig.py
+++ b/Reconstruction/Jet/JetRecConfig/python/JetRecConfig.py
@@ -215,7 +215,7 @@ def expandPrereqs(reqtype,prereqs):
 # name ("JetContainer"), configure it to containerName.
 def configureContainerName(modifiers, containerName):
     for mod in modifiers:
-        if "JetContainer" in mod.properties:
+        if "JetContainer" in mod.properties():
             mod.JetContainer = output