@@ -16,12 +16,10 @@
 
 #include "config.h"
 
 #define __NO_EXT_QNX
 
-#include <stdlib.h>
-
 #include <unistd.h>
 
 #include <assert.h>
 
 #import "OFStreamObserver.h"
@@ -297,30 +295,26 @@
 	[self cancel];
 }
 
 - (void)OF_addFileDescriptorForReading: (int)fd
 {
-	[self doesNotRecognizeSelector: _cmd];
-	abort();
+	OF_UNRECOGNIZED_SELECTOR
 }
 
 - (void)OF_addFileDescriptorForWriting: (int)fd
 {
-	[self doesNotRecognizeSelector: _cmd];
-	abort();
+	OF_UNRECOGNIZED_SELECTOR
 }
 
 - (void)OF_removeFileDescriptorForReading: (int)fd
 {
-	[self doesNotRecognizeSelector: _cmd];
-	abort();
+	OF_UNRECOGNIZED_SELECTOR
 }
 
 - (void)OF_removeFileDescriptorForWriting: (int)fd
 {
-	[self doesNotRecognizeSelector: _cmd];
-	abort();
+	OF_UNRECOGNIZED_SELECTOR
 }
 
 - (void)OF_processQueue
 {
 #ifdef OF_HAVE_THREADS
@@ -399,12 +393,11 @@
 	[self observeForTimeInterval: -1];
 }
 
 - (bool)observeForTimeInterval: (double)timeInterval
 {
-	[self doesNotRecognizeSelector: _cmd];
-	abort();
+	OF_UNRECOGNIZED_SELECTOR
 }
 
 - (bool)observeUntilDate: (OFDate*)date
 {
 	return [self observeForTimeInterval: [date timeIntervalSinceNow]];