diff --git a/conservancy_beancount/rtutil.py b/conservancy_beancount/rtutil.py
index 28a87ef06485d931da32e5e880e965930e620e77..abf8f237d882267002ada903511be24b0955a26e 100644
--- a/conservancy_beancount/rtutil.py
+++ b/conservancy_beancount/rtutil.py
@@ -116,8 +116,13 @@ class RTLinkCache(_LinkCache):
                 db.close()
                 db = sqlite3.connect(':memory:', isolation_level=None)
                 cursor = db.cursor()
+                # It would better to use
+                #   '{}?mode=ro'.format(cache_path.as_uri())
+                # as the argument here, but that doesn't work on SUSE 15,
+                # possibly because its sqlite doesn't recognize query
+                # arguments (added to upstream sqlite in late 2016).
                 cursor.execute('ATTACH DATABASE ? AS readsource',
-                               ('{}?mode=ro'.format(cache_path.as_uri()),))
+                               (os.fspath(cache_path),))
                 cursor.execute(cls.CREATE_TABLE_SQL)
                 cursor.execute('INSERT INTO RTLinkCache SELECT * FROM readsource.RTLinkCache')
                 cursor.execute('DETACH DATABASE readsource')