diff --git a/examples/simple_system/gpio.cpp b/examples/simple_system/gpio.cpp
index 3025af2..7dd728b 100644
--- a/examples/simple_system/gpio.cpp
+++ b/examples/simple_system/gpio.cpp
@@ -24,6 +24,7 @@ gpio::gpio(sc_core::sc_module_name nm)
 : sc_core::sc_module(nm)
 , tlm_target<>(clk)
 , NAMED(clk_i)
+, NAMED(rst_i)
 , NAMEDD(gpio_regs, regs)
 {
     regs->registerResources(*this);