diff --git a/pgloader.1.md b/pgloader.1.md
index 0074e06..954c2e3 100644
--- a/pgloader.1.md
+++ b/pgloader.1.md
@@ -1099,6 +1099,7 @@ Numbers:
   - type int to bigserial when auto_increment and (<= 10 precision)
   - type int to int       when not auto_increment and (< precision 10)
   - type int to bigint    when not auto_increment and (<= 10 precision)
+  - type smallint to serial  when auto_increment
   - type bigint to bigserial when auto_increment
 
   - type tinyint to boolean when (= 1 precision) using tinyint-to-boolean