diff --git a/stix2/datastore/relational_db/database_backends/sqlite_backend.py b/stix2/datastore/relational_db/database_backends/sqlite_backend.py
index b6cea195..a839b853 100644
--- a/stix2/datastore/relational_db/database_backends/sqlite_backend.py
+++ b/stix2/datastore/relational_db/database_backends/sqlite_backend.py
@@ -57,14 +57,11 @@ def determine_sql_type_for_timestamp_property():  # noqa: F811
     def array_allowed():
         return False
 
-    def create_regex_constraint_expression(self, column_name, pattern):
-        return None
-
-    def create_regex_constraint_and_expression(self, clause1, clause2):
-        return None
+    def create_regex_constraint_clause(self, column_name, pattern):
+        return f"{column_name} REGEXP {pattern}"
 
     @staticmethod
     def next_id(data_sink):
-        # hack, which is nit reliable
+        # hack, which is not reliable, must look for a better solution
         SQLiteBackend.temp_sequence_count += 1
         return SQLiteBackend.temp_sequence_count