diff --git a/lib/galaxy/model/__init__.py b/lib/galaxy/model/__init__.py
index 51af5d5a76b3..0e1de33ec2de 100644
--- a/lib/galaxy/model/__init__.py
+++ b/lib/galaxy/model/__init__.py
@@ -902,7 +902,7 @@ def get_disk_usage(self, nice_size=False, quota_source_label=None):
                 "user_id": self.id,
                 "label": quota_source_label,
             }
-            row = sa_session.execute(statement, params).fetchone()
+            row = sa_session.execute(text(statement), params).fetchone()
             if row is not None:
                 rval = row[0]
             else: