diff -r 3497f74028fe src/exec.c
--- a/src/exec.c	Fri May 23 13:29:20 2014 -0600
+++ b/src/exec.c	Sat May 24 14:17:02 2014 +0200
@@ -404,7 +404,7 @@
      * Note: HP-UX select() will not be interrupted if SA_RESTART set.
      */
     memset(&sa, 0, sizeof(sa));
-    sigfillset(&sa.sa_mask);
+    sigemptyset(&sa.sa_mask);
     sa.sa_flags = SA_INTERRUPT; /* do not restart syscalls */
 #ifdef SA_SIGINFO
     sa.sa_flags |= SA_SIGINFO;