Index: configure.ac
==================================================================
--- configure.ac
+++ configure.ac
@@ -536,10 +536,12 @@
 	])
 	AC_MSG_RESULT($ac_cv_snprintf_useful_ret)
 ])
 test x"$have_asprintf" != x"yes" -a x"$ac_cv_snprintf_useful_ret" != x"yes" && \
 	AC_MSG_ERROR(No asprintf and no snprintf returning required space!)
+
+AC_CHECK_FUNCS(sigaction)
 
 AC_CHECK_FUNCS([arc4random random], break)
 
 AC_CHECK_LIB(dl, dlopen, LIBS="$LIBS -ldl")
 AC_CHECK_HEADERS_ONCE(dlfcn.h)

Index: src/OFApplication.m
==================================================================
--- src/OFApplication.m
+++ src/OFApplication.m
@@ -417,27 +417,47 @@
 	return _delegate;
 }
 
 - (void)setDelegate: (id <OFApplicationDelegate>)delegate
 {
-	_delegate = delegate;
+#ifdef HAVE_SIGACTION
+	struct sigaction sa = { .sa_flags = SA_RESTART };
+	sigemptyset(&sa.sa_mask);
 
-#define REGISTER_SIGNAL(sig)						\
+# define REGISTER_SIGNAL(sig)						\
+	if ([delegate respondsToSelector:				\
+	    @selector(applicationDidReceive##sig)]) {			\
+		_##sig##Handler = (void(*)(id, SEL))[(id)delegate	\
+		    methodForSelector:					\
+		    @selector(applicationDidReceive##sig)];		\
+									\
+		sa.sa_handler = handle##sig;				\
+	} else								\
+		sa.sa_handler = SIG_DFL;				\
+									\
+	OF_ENSURE(sigaction(sig, &sa, NULL) == 0);
+#else
+# define REGISTER_SIGNAL(sig)						\
 	if ([delegate respondsToSelector:				\
 	    @selector(applicationDidReceive##sig)]) {			\
 		_##sig##Handler = (void(*)(id, SEL))[(id)delegate	\
 		    methodForSelector:					\
 		    @selector(applicationDidReceive##sig)];		\
 		signal(sig, handle##sig);				\
 	} else								\
 		signal(sig, SIG_DFL);
+#endif
+
+	_delegate = delegate;
+
 	REGISTER_SIGNAL(SIGINT)
 #ifndef OF_WINDOWS
 	REGISTER_SIGNAL(SIGHUP)
 	REGISTER_SIGNAL(SIGUSR1)
 	REGISTER_SIGNAL(SIGUSR2)
 #endif
+
 #undef REGISTER_SIGNAL
 }
 
 - (void)OF_run
 {