diff --git a/man2/sigaction.2 b/man2/sigaction.2
index cacf7b866..96b4a575c 100644
--- a/man2/sigaction.2
+++ b/man2/sigaction.2
@@ -317,7 +317,7 @@ siginfo_t {
     int      si_status;    /* Exit value or signal */
     clock_t  si_utime;     /* User time consumed */
     clock_t  si_stime;     /* System time consumed */
-    sigval_t si_value;     /* Signal value */
+    union sigval si_value; /* Signal value */
     int      si_int;       /* POSIX.1b signal */
     void    *si_ptr;       /* POSIX.1b signal */
     int      si_overrun;   /* Timer overrun count;