diff --git a/rowers/dataprep.py b/rowers/dataprep.py
index d8591acc..cf1081cb 100644
--- a/rowers/dataprep.py
+++ b/rowers/dataprep.py
@@ -327,7 +327,7 @@ def clean_df_stats(datadf, workstrokesonly=True, ignorehr=True,
     # protect 0 spm values from being nulled
     try:
         datadf['spm'] = datadf['spm'] + 1.0
-    except TypeError:
+    except (KeyError,TypeError) as e:
         pass
         
     try:
@@ -340,7 +340,7 @@ def clean_df_stats(datadf, workstrokesonly=True, ignorehr=True,
     # bring spm back to real values
     try:
         datadf['spm'] = datadf['spm'] - 1
-    except TypeError:
+    except (TypeError,KeyError) as e:
         pass
 
     # return from positive domain to negative