diff --git a/doc/src/sgml/limits.sgml b/doc/src/sgml/limits.sgml
index d5b2b627dd..de6bf7697f 100644
--- a/doc/src/sgml/limits.sgml
+++ b/doc/src/sgml/limits.sgml
@@ -80,6 +80,12 @@
      <entry>can be increased by recompiling <productname>PostgreSQL</productname></entry>
     </row>
 
+    <row>
+     <entry>function arguments</entry>
+     <entry>65535</entry>
+     <entry></entry>
+    </row>
+
     <row>
      <entry>indexes per table</entry>
      <entry>unlimited</entry>