Index: src/OFStreamObserver_kqueue.m
==================================================================
--- src/OFStreamObserver_kqueue.m
+++ src/OFStreamObserver_kqueue.m
@@ -28,10 +28,11 @@
 #import "OFStreamObserver_kqueue.h"
 #import "OFDataArray.h"
 
 #import "OFInitializationFailedException.h"
 #import "OFOutOfMemoryException.h"
+#import "OFOutOfRangeException.h"
 
 #import "autorelease.h"
 #import "macros.h"
 
 #define EVENTLIST_SIZE 64
@@ -68,18 +69,24 @@
 
 - (void)OF_addFileDescriptorForReading: (int)fd
 {
 	struct kevent event;
 
+	if ([changeList count] >= INT_MAX)
+		@throw [OFOutOfRangeException exceptionWithClass: [self class]];
+
 	EV_SET(&event, fd, EVFILT_READ, EV_ADD, 0, 0, 0);
 	[changeList addItem: &event];
 }
 
 - (void)OF_addFileDescriptorForWriting: (int)fd
 {
 	struct kevent event;
 
+	if ([changeList count] >= INT_MAX)
+		@throw [OFOutOfRangeException exceptionWithClass: [self class]];
+
 	EV_SET(&event, fd, EVFILT_WRITE, EV_ADD, 0, 0, 0);
 	[changeList addItem: &event];
 }
 
 - (void)OF_removeFileDescriptorForReading: (int)fd