diff --git a/lib/cocoa/TProtocolFactory.h b/lib/cocoa/TProtocolFactory.h
new file mode 100644
index 0000000..06d62c8
--- /dev/null
+++ b/lib/cocoa/TProtocolFactory.h
@@ -0,0 +1,10 @@
+#import <Cocoa/Cocoa.h>
+#import "TProtocol.h"
+#import "TTransport.h"
+
+
+@protocol TProtocolFactory <NSObject>
+
+- (id <TProtocol>) newProtocolOnTransport: (id <TTransport>) transport;
+
+@end