diff --git a/oml/fulltext.py b/oml/fulltext.py
index 579427d..d7d6d3e 100644
--- a/oml/fulltext.py
+++ b/oml/fulltext.py
@@ -3,6 +3,7 @@ import os
 import subprocess
 import sys
 
+from sqlalchemy.sql import operators
 
 logger = logging.getLogger(__name__)