diff --git a/scripts-available/CDB_CartodbfyTable.sql b/scripts-available/CDB_CartodbfyTable.sql
index dbea59a..51fcff6 100644
--- a/scripts-available/CDB_CartodbfyTable.sql
+++ b/scripts-available/CDB_CartodbfyTable.sql
@@ -835,6 +835,8 @@ BEGIN
 
   -- If mercgeom is the wrong name, just rename it.
   IF has_mercgeom AND has_mercgeom_name != const.mercgeomcol THEN  
+    sql := Format('ALTER TABLE %I DROP COLUMN IF EXISTS %I', reloid::text, const.mercgeomcol);
+    PERFORM _CDB_SQL(sql,'_CDB_Has_Usable_Geom');
     sql := Format('ALTER TABLE %s RENAME COLUMN %s TO %s', reloid::text, has_mercgeom_name, const.mercgeomcol);
     PERFORM _CDB_SQL(sql,'_CDB_Has_Usable_Geom');
   END IF;