diff --git a/common/os_calls.c b/common/os_calls.c
index 6b90ffc9..90110963 100644
--- a/common/os_calls.c
+++ b/common/os_calls.c
@@ -797,10 +797,13 @@ g_signal_child_stop(void (*func)(int))
 void
 g_unset_signals(void)
 {
+#if defined(_WIN32)
+#else
   sigset_t mask;
 
   sigemptyset(&mask);
   sigprocmask(SIG_SETMASK, &mask, NULL);
+#endif
 }
 
 /*****************************************************************************/