diff --git a/src/signal_handler.cc b/src/signal_handler.cc
index f16ac1df..e5efecba 100644
--- a/src/signal_handler.cc
+++ b/src/signal_handler.cc
@@ -80,9 +80,10 @@ SignalHandler::set_sigaction_handler(unsigned int signum, handler_slot slot) {
 
   struct sigaction sa;
   sa.sa_sigaction = slot;
-  sa.sa_mask = (sigset_t)0;
   sa.sa_flags = SA_SIGINFO;
 
+  sigemptyset(&sa.sa_mask);
+
   if (sigaction(signum, &sa, NULL) == -1)
     throw std::logic_error("Could not set sigaction: " + std::string(rak::error_number::current().c_str()));
 }