diff --git a/man2/sigaction.2 b/man2/sigaction.2
index dc8657a17..0245bbca2 100644
--- a/man2/sigaction.2
+++ b/man2/sigaction.2
@@ -229,7 +229,7 @@ siginfo_t {
 
 .IR si_signo ", " si_errno " and " si_code
 are defined for all signals.
-.RI ( si_signo
+.RI ( si_errno
 is unused on Linux.)
 The rest of the struct may be a union, so that one should only
 read the fields that are meaningful for the given signal: