diff --git a/pglast/printers/dml.py b/pglast/printers/dml.py
index c7f67a3..ed2874e 100644
--- a/pglast/printers/dml.py
+++ b/pglast/printers/dml.py
@@ -770,7 +770,7 @@ def insert_stmt(node, output):
             output.print_list(node.cols)
             output.write(')')
         else:
-            output.write(' ')
+            output.separator()
         if node.override:
             if node.override == enums.OverridingKind.OVERRIDING_USER_VALUE:
                 output.write(' OVERRIDING USER VALUE ')
diff --git a/tests/test_printers_prettification/dml/insert.sql b/tests/test_printers_prettification/dml/insert.sql
index 522af2f..3280442 100644
--- a/tests/test_printers_prettification/dml/insert.sql
+++ b/tests/test_printers_prettification/dml/insert.sql
@@ -26,3 +26,9 @@ VALUES (1, 'this is short enough'),
        (2, 'this is too long, and will be splitted')
 :
 {'comma_at_eoln': True}
+
+insert into foo select * from bar
+=
+INSERT INTO foo
+SELECT *
+FROM bar