diff --git a/ParaUtils/AWR/__init__.py b/ParaUtils/AWR/__init__.py
index 6fddcb6..dcb1200 100644
--- a/ParaUtils/AWR/__init__.py
+++ b/ParaUtils/AWR/__init__.py
@@ -38,6 +38,6 @@ def find_AWR(performances,AWR=Current_AWR,identifier='SNC_ID'):
             on='Gender EventClass Stroke Distance'.split(),
             how='inner'
         )
-        .groupby(identifier+'Gender EventClass Stroke Distance'.split(),group_keys=False)
+        .groupby([identifier]+'Gender EventClass Stroke Distance'.split(),group_keys=False)
         .apply(lambda df: df.assign(AWR=1+len(df[df.AWR < df.Seconds])).head(1))
     )
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