diff --git a/src/CPUSensorMain.cpp b/src/CPUSensorMain.cpp
index eb619b9..de8607b 100644
--- a/src/CPUSensorMain.cpp
+++ b/src/CPUSensorMain.cpp
@@ -775,4 +775,5 @@
 
     setupManufacturingModeMatch(*systemBus);
     io.run();
+    return 0;
 }