diff --git a/src/include/catalog/pg_proc.dat b/src/include/catalog/pg_proc.dat
index 1dd325e0e6..ecf1299ef3 100644
--- a/src/include/catalog/pg_proc.dat
+++ b/src/include/catalog/pg_proc.dat
@@ -3551,10 +3551,12 @@
 { oid => '2765', descr => 'split string by pattern',
   proname => 'regexp_split_to_table', prorows => '1000', proretset => 't',
   prorettype => 'text', proargtypes => 'text text',
+  proargnames => '{string,pattern}',
   prosrc => 'regexp_split_to_table_no_flags' },
 { oid => '2766', descr => 'split string by pattern',
   proname => 'regexp_split_to_table', prorows => '1000', proretset => 't',
   prorettype => 'text', proargtypes => 'text text text',
+  proargnames => '{string,pattern,flags}',
   prosrc => 'regexp_split_to_table' },
 { oid => '2767', descr => 'split string by pattern',
   proname => 'regexp_split_to_array', prorettype => '_text',