Index: src/OFKernelEventObserver_poll.m
==================================================================
--- src/OFKernelEventObserver_poll.m
+++ src/OFKernelEventObserver_poll.m
@@ -16,10 +16,11 @@
 
 #define __NO_EXT_QNX
 
 #include "config.h"
 
+#include <assert.h>
 #include <errno.h>
 
 #ifdef HAVE_POLL_H
 # include <poll.h>
 #endif
@@ -178,12 +179,11 @@
 	if (events < 0)
 		@throw [OFObserveFailedException exceptionWithObserver: self
 								 errNo: errno];
 
 	for (i = 0; i < nFDs; i++) {
-		if (FDs[i].fd > _maxFD)
-			@throw [OFOutOfRangeException exception];
+		assert(FDs[i].fd <= _maxFD);
 
 		if (FDs[i].revents & POLLIN) {
 			if (FDs[i].fd == _cancelFD[0]) {
 				char buffer;