diff --git a/man5/proc.5 b/man5/proc.5
index bf33387c5..20bfddbb6 100644
--- a/man5/proc.5
+++ b/man5/proc.5
@@ -409,6 +409,7 @@ There are additional helpful pseudo-paths:
 The initial process's (also known as the main thread's) stack
 .TP
 .IR [stack:<tid>] " (since Linux 3.4)"
+.\" commit b76437579d1344b612cf1851ae610c636cec7db0
 A thread's stack (where the
 .IR <tid>
 is a thread ID).