diff --git a/Code/Mantid/Framework/PythonInterface/plugins/algorithms/WorkflowAlgorithms/ElasticWindowMultiple.py b/Code/Mantid/Framework/PythonInterface/plugins/algorithms/WorkflowAlgorithms/ElasticWindowMultiple.py
index 72462e88a5e0..8d7f755eb75f 100644
--- a/Code/Mantid/Framework/PythonInterface/plugins/algorithms/WorkflowAlgorithms/ElasticWindowMultiple.py
+++ b/Code/Mantid/Framework/PythonInterface/plugins/algorithms/WorkflowAlgorithms/ElasticWindowMultiple.py
@@ -58,7 +58,8 @@ def PyInit(self):
                              doc='Name of the sample environment log entry')
 
         sampEnvLogVal_type = ['last_value', 'average']
-        self.declareProperty('SampleEnvironmentLogValue', 'last value', StringListValidator(sampEnvLogVal_type),
+        self.declareProperty('SampleEnvironmentLogValue', 'last_value',
+                             StringListValidator(sampEnvLogVal_type),
                              doc='Value selection of the sample environment log entry')
 
         self.declareProperty(WorkspaceProperty('OutputInQ', '', Direction.Output),