diff --git a/doc_src/index.hdr.in b/doc_src/index.hdr.in
index 12eeeb994..15a49bdee 100644
--- a/doc_src/index.hdr.in
+++ b/doc_src/index.hdr.in
@@ -699,7 +699,6 @@ When combining multiple parameter expansions, expansions are performed in the fo
 - Command substitutions
 - Variable expansions
 - Bracket expansion
-- Pid expansion
 - Wildcard expansion
 
 Expansions are performed from right to left, nested bracket expansions are performed from the inside and out.