diff --git a/django/db/backends/postgresql/creation.py b/django/db/backends/postgresql/creation.py
index af26d0b78f5fd..1a821afe07d95 100644
--- a/django/db/backends/postgresql/creation.py
+++ b/django/db/backends/postgresql/creation.py
@@ -63,7 +63,7 @@ def get_index_sql(index_name, opclass=''):
             # a second index that specifies their operator class, which is
             # needed when performing correct LIKE queries outside the
             # C locale. See #12234.
-            db_type = f.db_type()
+            db_type = f.db_type(connection=self.connection)
             if db_type.startswith('varchar'):
                 output.append(get_index_sql('%s_%s_like' % (db_table, f.column),
                                             ' varchar_pattern_ops'))