diff --git a/Source/MIKMIDIInputPort.m b/Source/MIKMIDIInputPort.m
index 659f5ec5..7aab44ee 100644
--- a/Source/MIKMIDIInputPort.m
+++ b/Source/MIKMIDIInputPort.m
@@ -171,7 +171,7 @@ - (void)removeEventHandlerForConnectionToken:(NSString *)connectionToken source:
 
 - (MIKMIDISourceEndpoint *)sourceEndpointForConnectionToken:(NSString *)token
 {
-	for (MIKMIDISourceEndpoint *source in self.handlerTokenPairsByEndpoint.objectEnumerator) {
+	for (MIKMIDISourceEndpoint *source in self.handlerTokenPairsByEndpoint) {
 		NSArray *handlerPairs = [self.handlerTokenPairsByEndpoint objectForKey:source];
 		for (MIKMIDIConnectionTokenAndEventHandler *handlerPair in handlerPairs) {
 			if ([handlerPair.connectionToken isEqual:token]) {