diff --git a/lib/cocoa/TApplicationException.h b/lib/cocoa/TApplicationException.h
new file mode 100644
index 0000000..bb64282
--- /dev/null
+++ b/lib/cocoa/TApplicationException.h
@@ -0,0 +1,19 @@
+enum {
+  TApplicationException_UNKNOWN = 0,
+  TApplicationException_UNKNOWN_METHOD = 1,
+  TApplicationException_INVALID_MESSAGE_TYPE = 2,
+  TApplicationException_WRONG_METHOD_NAME = 3,
+  TApplicationException_BAD_SEQUENCE_ID = 4,
+  TApplicationException_MISSING_RESULT = 5
+};
+
+// FIXME
+@interface TApplicationException : NSException {
+}
+
++ (TApplicationException *) read: (id <TProtocol>) protocol;
+
++ (TApplicationException *) exceptionWithType: (int) type
+                                      message: (NSString *) message;
+
+@end