diff --git a/lib/busvoodoo_uart_generic.h b/lib/busvoodoo_uart_generic.h
index d9a0426..8786917 100644
--- a/lib/busvoodoo_uart_generic.h
+++ b/lib/busvoodoo_uart_generic.h
@@ -63,4 +63,4 @@ void busvoodoo_uart_generic_exit(void);
  */
 #define busvoodoo_uart_generic_commands_nb 5
 /** commands supported by the generic UART mode */
-extern const struct menu_command_t busvoodoo_uart_generic_commands[];
+extern const struct menu_command_t busvoodoo_uart_generic_commands[busvoodoo_uart_generic_commands_nb];