Index: configure.ac
==================================================================
--- configure.ac
+++ configure.ac
@@ -1324,19 +1324,13 @@
 ])
 
 AC_CHECK_HEADERS(sys/utsname.h)
 AC_CHECK_FUNCS(uname)
 
-case "$host_os" in
-	amigaos*)
-		;;
-	*)
-		AC_CHECK_FUNC(pipe, [
-			AC_DEFINE(OF_HAVE_PIPE, 1, [Whether we have pipe()])
-		])
-		;;
-esac
+AC_CHECK_FUNC(pipe, [
+	AC_DEFINE(OF_HAVE_PIPE, 1, [Whether we have pipe()])
+])
 
 AC_ARG_ENABLE(sockets,
 	AS_HELP_STRING([--disable-sockets], [disable socket support]))
 AS_IF([test x"$enable_sockets" != x"no"], [
 	AC_DEFINE(OF_HAVE_SOCKETS, 1, [Whether we have sockets])

Index: src/OFKernelEventObserver.h
==================================================================
--- src/OFKernelEventObserver.h
+++ src/OFKernelEventObserver.h
@@ -122,15 +122,15 @@
 	OFMutableArray OF_GENERIC(id <OFReadyForReadingObserving>)
 	    *_readObjects;
 	OFMutableArray OF_GENERIC(id <OFReadyForWritingObserving>)
 	    *_writeObjects;
 	id <OFKernelEventObserverDelegate> _Nullable _delegate;
-#if defined(OF_HAVE_PIPE)
-	int _cancelFD[2];
-#elif defined(OF_AMIGAOS)
+#if defined(OF_AMIGAOS)
 	struct Task *_waitingTask;
 	ULONG _cancelSignal;
+#elif defined(OF_HAVE_PIPE)
+	int _cancelFD[2];
 #else
 	of_socket_t _cancelFD[2];
 	struct sockaddr_in _cancelAddr;
 #endif
 #ifdef OF_AMIGAOS

Index: src/OFKernelEventObserver.m
==================================================================
--- src/OFKernelEventObserver.m
+++ src/OFKernelEventObserver.m
@@ -113,11 +113,11 @@
 #endif
 
 		_readObjects = [[OFMutableArray alloc] init];
 		_writeObjects = [[OFMutableArray alloc] init];
 
-#if defined(OF_HAVE_PIPE)
+#if defined(OF_HAVE_PIPE) && !defined(OF_AMIGAOS)
 		if (pipe(_cancelFD))
 			@throw [OFInitializationFailedException
 			    exceptionWithClass: self.class];
 #elif !defined(OF_AMIGAOS)
 		_cancelFD[0] = _cancelFD[1] = socket(AF_INET, SOCK_DGRAM, 0);
@@ -174,11 +174,11 @@
 	return self;
 }
 
 - (void)dealloc
 {
-#if defined(OF_HAVE_PIPE)
+#if defined(OF_HAVE_PIPE) && !defined(OF_AMIGAOS)
 	close(_cancelFD[0]);
 	if (_cancelFD[1] != _cancelFD[0])
 		close(_cancelFD[1]);
 #elif !defined(OF_AMIGAOS)
 	closesocket(_cancelFD[0]);
@@ -257,25 +257,25 @@
 	[self observeForTimeInterval: date.timeIntervalSinceNow];
 }
 
 - (void)cancel
 {
-#if defined(OF_HAVE_PIPE)
-	OF_ENSURE(write(_cancelFD[1], "", 1) > 0);
-#elif defined(OF_AMIGAOS)
+#if defined(OF_AMIGAOS)
 	Forbid();
 
 	if (_waitingTask != NULL) {
 		Signal(_waitingTask, (1ul << _cancelSignal));
 		_waitingTask = NULL;
 	}
 
 	Permit();
+#elif defined(OF_HAVE_PIPE)
+	OF_ENSURE(write(_cancelFD[1], "", 1) > 0);
 #elif defined(OF_WII)
 	OF_ENSURE(sendto(_cancelFD[1], "", 1, 0,
 	    (struct sockaddr *)&_cancelAddr, 8) > 0);
 #else
 	OF_ENSURE(sendto(_cancelFD[1], (void *)"", 1, 0,
 	    (struct sockaddr *)&_cancelAddr, sizeof(_cancelAddr)) > 0);
 #endif
 }
 @end