1 files changed, 15 insertions, 0 deletions
diff --git a/signal.c b/signal.c
index 5d5cb6b2b6..34d229a71d 100644
--- a/signal.c
+++ b/signal.c
@@ -935,6 +935,13 @@ check_reserved_signal_(const char *name, size_t name_len)
 }
 #endif
 
+#ifdef SIGSYS
+static RETSIGTYPE
+sig_do_nothing(int sig)
+{
+}
+#endif
+
 static void
 signal_exec(VALUE cmd, int safe, int sig)
 {
@@ -1062,6 +1069,11 @@ default_handler(int sig)
         func = SIG_IGN;
         break;
 #endif
+#ifdef SIGSYS
+      case SIGSYS:
+        func = sig_do_nothing;
+        break;
+#endif
       default:
         func = SIG_DFL;
         break;
@@ -1477,6 +1489,9 @@ Init_signal(void)
 #ifdef SIGPIPE
     install_sighandler(SIGPIPE, SIG_IGN);
 #endif
+#ifdef SIGSYS
+    install_sighandler(SIGSYS, sig_do_nothing);
+#endif
 
 #if defined(SIGCLD)
     init_sigchld(SIGCLD);