diff --git a/rowers/dataprepnodjango.py b/rowers/dataprepnodjango.py
index 56da1378..5e428193 100644
--- a/rowers/dataprepnodjango.py
+++ b/rowers/dataprepnodjango.py
@@ -502,7 +502,10 @@ def fitnessmetric_to_sql(m,table='powertimefitnessmetric',debug=False):
         engine = create_engine(database_url, echo=False)
         
     columns = ', '.join(m.keys())
-    placeholders  = ", ".join(["?"] * len(m))
+    if debug:
+        placeholders  = ", ".join(["?"] * len(m))
+    else:
+        placeholders  = ", ".join(["%s"] * len(m))
 
     query = "INSERT into %s ( %s ) Values (%s)" % (table, columns, placeholders)