diff --git a/man7/capabilities.7 b/man7/capabilities.7
index c06bf16a3..9e79783bc 100644
--- a/man7/capabilities.7
+++ b/man7/capabilities.7
@@ -670,6 +670,7 @@ a thread may manipulate its own capability sets (see below).
 .PP
 Since Linux 3.2, the file
 .I /proc/sys/kernel/cap_last_cap
+.\" commit 73efc0394e148d0e15583e13712637831f926720
 exposes the numerical value of the highest capability
 supported by the running kernel;
 this can be used to determine the highest bit