diff --git a/examples/main_adc.cc b/examples/main_adc.cc
index 18b68a2..f394252 100644
--- a/examples/main_adc.cc
+++ b/examples/main_adc.cc
@@ -22,7 +22,7 @@ namespace Heck {
             }
 
             scan_pots.set_period(10);
-            scan_pots.set_callback([]() {
+            scan_pots.set_callback([](u32) {
                 pot1.on_change_fuzzy(seed.adc.Get(0), 20, [](int val) {
                     seed.PrintLine("POT_1: %d", val);
                 });