diff --git a/src/IpmbSensor.cpp b/src/IpmbSensor.cpp
index 22e4862..f52f95e 100644
--- a/src/IpmbSensor.cpp
+++ b/src/IpmbSensor.cpp
@@ -646,4 +646,5 @@
 
     setupManufacturingModeMatch(*systemBus);
     io.run();
+    return 0;
 }