@@ -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.
  *