diff --git a/Control/AthenaPython/python/FilePeekerLib.py b/Control/AthenaPython/python/FilePeekerLib.py
index 8862a188bbcd1f85bb15c7bf4c532a5d2b3e783e..41a0f4f7a2e20a980d5ce8b785b89df4adfb3bf7 100644
--- a/Control/AthenaPython/python/FilePeekerLib.py
+++ b/Control/AthenaPython/python/FilePeekerLib.py
@@ -231,7 +231,7 @@ class FilePeeker(PyAthena.Alg):
                     spec   = a.specification()
                     a_type = spec.typeName()
                     if a_type.find('string') >= 0:
-                        a_data = a.data('string')()
+                        a_data = a.data['string']()
                         try:
                             a_data = eval(a_data,{},{})
                         except Exception: