diff --git a/man2/sigaction.2 b/man2/sigaction.2
index 318392d0e..fc4425105 100644
--- a/man2/sigaction.2
+++ b/man2/sigaction.2
@@ -961,6 +961,19 @@ See
 .BR nptl (7)
 for details.
 .PP
+On architectures where the signal trampoline resides in the C library,
+the glibc wrapper function for
+.BR sigaction ()
+places the address of the trampoline code in the
+.I act.sa_restorer
+field and sets the
+.B SA_RESTORER
+flag in the
+.IR act.sa_flags
+field.
+See
+.BR sigreturn (2).
+.PP
 The original Linux system call was named
 .BR sigaction ().
 However, with the addition of real-time signals in Linux 2.2,