diff --git a/rowers/dataprep.py b/rowers/dataprep.py
index 0d36b49b..7fa99401 100644
--- a/rowers/dataprep.py
+++ b/rowers/dataprep.py
@@ -1815,8 +1815,12 @@ def getrowdata_db(id=0, doclean=False, convertnewtons=True,
 
 
 
-    if not data.empty and data['efficiency'].mean() == 0 and data['power'].mean() != 0 and checkefficiency == True:
-        data = add_efficiency(id=id)
+    if checkefficiency==True and not data.empty:
+        try:
+            if data['efficiency'].mean() == 0 and data['power'].mean() != 0:
+                data = add_efficiency(id=id)
+        except KeyError:
+            data = add_efficiency(id=id)
 
     if doclean:
         data = clean_df_stats(data, ignorehr=True)