diff --git a/src/FanMain.cpp b/src/FanMain.cpp
index 786498c..a32d054 100644
--- a/src/FanMain.cpp
+++ b/src/FanMain.cpp
@@ -188,7 +188,7 @@
                 // convert to 0 based
                 size_t index = std::stoul(indexStr) - 1;
 
-                const char* baseType;
+                const char* baseType = nullptr;
                 const SensorData* sensorData = nullptr;
                 const std::string* interfacePath = nullptr;
                 const SensorBaseConfiguration* baseConfiguration = nullptr;