diff --git a/common/rxpack.h b/common/rxpack.h
index 8fe6ec22..8cb16851 100644
--- a/common/rxpack.h
+++ b/common/rxpack.h
@@ -201,6 +201,7 @@ int TermRxPackage( char *, int );
 int InitialisePackage( void );
 int TerminatePackage( void );
 int RegisterRxFunctions( void );
+int RegisterRxSubcom( void );
 int QueryRxFunction( char * );
 int DeregisterRxFunctions( int );
 char *make_upper( char * );
@@ -236,6 +237,7 @@ int TermRxPackage( );
 int InitialisePackage( );
 int TerminatePackage( );
 int RegisterRxFunctions( );
+int RegisterRxSubcom( );
 int QueryRxFunction( );
 int DeregisterRxFunctions( );
 char *make_upper ( );