Index: Doxyfile
==================================================================
--- Doxyfile
+++ Doxyfile
@@ -21,9 +21,12 @@
 	     OF_RETURNS_INNER_POINTER		\
 	     OF_RETURNS_NOT_RETAINED		\
 	     OF_RETURNS_RETAINED		\
 	     OF_ROOT_CLASS			\
 	     OF_SENTINEL			\
-	     OF_WEAK_UNAVAILABLE
+	     OF_WEAK_UNAVAILABLE		\
+	     SIGHUP				\
+	     SIGUSR1				\
+	     SIGUSR2
 MACRO_EXPANSION = YES
 EXPAND_ONLY_PREDEF = YES
 IGNORE_PREFIX = OF of_

Index: src/OFApplication.h
==================================================================
--- src/OFApplication.h
+++ src/OFApplication.h
@@ -11,10 +11,12 @@
  * Alternatively, it may be distributed under the terms of the GNU General
  * Public License, either version 2 or 3, which can be found in the file
  * LICENSE.GPLv2 or LICENSE.GPLv3 respectively included in the packaging of this
  * file.
  */
+
+#include <signal.h>
 
 #import "OFObject.h"
 
 OF_ASSUME_NONNULL_BEGIN
 
@@ -64,11 +66,11 @@
  *	    signal-safe operations like setting a variable or calling a
  *	    signal-safe function!
  */
 - (void)applicationDidReceiveSIGINT;
 
-#ifndef OF_WINDOWS
+#ifdef SIGHUP
 /*!
  * @brief A method which is called when the application received a SIGHUP.
  *
  * This signal is not available on Windows.
  *
@@ -76,11 +78,13 @@
  *	    message dispatching is not signal-safe! You are only allowed to do
  *	    signal-safe operations like setting a variable or calling a
  *	    signal-safe function!
  */
 - (void)applicationDidReceiveSIGHUP;
+#endif
 
+#ifdef SIGUSR1
 /*!
  * @brief A method which is called when the application received a SIGUSR1.
  *
  * This signal is not available on Windows.
  *
@@ -88,11 +92,13 @@
  *	    message dispatching is not signal-safe! You are only allowed to do
  *	    signal-safe operations like setting a variable or calling a
  *	    signal-safe function!
  */
 - (void)applicationDidReceiveSIGUSR1;
+#endif
 
+#ifdef SIGUSR2
 /*!
  * @brief A method which is called when the application received a SIGUSR2.
  *
  * This signal is not available on Windows.
  *

Index: src/OFApplication.m
==================================================================
--- src/OFApplication.m
+++ src/OFApplication.m
@@ -96,13 +96,17 @@
 	{							\
 		app->_##sig##Handler(app->_delegate,		\
 		    @selector(applicationDidReceive##sig));	\
 	}
 SIGNAL_HANDLER(SIGINT)
-#ifndef OF_WINDOWS
+#ifdef SIGHUP
 SIGNAL_HANDLER(SIGHUP)
+#endif
+#ifdef SIGUSR1
 SIGNAL_HANDLER(SIGUSR1)
+#endif
+#ifdef SIGUSR2
 SIGNAL_HANDLER(SIGUSR2)
 #endif
 #undef SIGNAL_HANDLER
 
 int
@@ -460,13 +464,17 @@
 #endif
 
 	_delegate = delegate;
 
 	REGISTER_SIGNAL(SIGINT)
-#ifndef OF_WINDOWS
+#ifdef SIGHUP
 	REGISTER_SIGNAL(SIGHUP)
+#endif
+#ifdef SIGUSR1
 	REGISTER_SIGNAL(SIGUSR1)
+#endif
+#ifdef SIGUSR2
 	REGISTER_SIGNAL(SIGUSR2)
 #endif
 
 #undef REGISTER_SIGNAL
 }