diff --git a/cpp/buses/bus.cpp b/cpp/buses/bus.cpp
index 1a5f1557..bd60c070 100644
--- a/cpp/buses/bus.cpp
+++ b/cpp/buses/bus.cpp
@@ -305,7 +305,7 @@ bool Bus::WaitSignal(int pin, bool state)
         }
     } while ((chrono::duration_cast < chrono::seconds > (chrono::steady_clock::now() - now).count()) < 3);
 
-    spdlog::trace("Timeout while waiting for ACK/REQ to change");
+    spdlog::trace("Timeout while waiting for ACK/REQ to change to {}", state ? "true" : "false");
 
     return false;
 }