@@ -17,10 +17,12 @@
 #import "NSDictionary_OFDictionary.h"
 #import "OFDictionary.h"
 
 #import "NSBridging.h"
 #import "OFBridging.h"
+
+#import "OFOutOfRangeException.h"
 
 @implementation NSDictionary_OFDictionary
 - initWithOFDictionary: (OFDictionary*)dictionary_
 {
 	if ((self = [super init]) != nil) {
@@ -47,10 +49,15 @@
 		return [object NSObject];
 
 	return object;
 }
 
-- (size_t)count
+- (NSUInteger)count
 {
-	return [dictionary count];
+	size_t count = [dictionary count];
+
+	if (count > NSUIntegerMax)
+		@throw [OFOutOfRangeException exceptionWithClass: [self class]];
+
+	return (NSUInteger)count;
 }
 @end