diff --git a/engine/menu_int.h b/engine/menu_int.h
index ee48ed48..cdb918bf 100644
--- a/engine/menu_int.h
+++ b/engine/menu_int.h
@@ -87,10 +87,10 @@ typedef struct ui_enginefuncs_s
 	const char*	(*pfnCmd_Args)( void );
 
 	// debug messages (in-menu shows only notify)
-	void	(*Con_Printf)( const char *fmt, ... );
-	void	(*Con_DPrintf)( const char *fmt, ... );
-	void	(*Con_NPrintf)( int pos, const char *fmt, ... );
-	void	(*Con_NXPrintf)( struct con_nprint_s *info, const char *fmt, ... );
+	void	(*Con_Printf)( const char *fmt, ... ) _format( 1 );
+	void	(*Con_DPrintf)( const char *fmt, ... )  _format( 1 );
+	void	(*Con_NPrintf)( int pos, const char *fmt, ... )  _format( 2 );
+	void	(*Con_NXPrintf)( struct con_nprint_s *info, const char *fmt, ... ) _format( 2 );
 
 	// sound handlers
 	void	(*pfnPlayLocalSound)( const char *szSound );
@@ -116,7 +116,7 @@ typedef struct ui_enginefuncs_s
 	int	(*CL_CreateVisibleEntity)( int type, struct cl_entity_s *ent );
 
 	// misc handlers
-	void	(*pfnHostError)( const char *szFmt, ... );
+	void	(*pfnHostError)( const char *szFmt, ... ) _format( 1 ) NORETURN;
 	int	(*pfnFileExists)( const char *filename, int gamedironly );
 	void	(*pfnGetGameDir)( char *szGetGameDir );