diff --git a/include/PSUSensor.hpp b/include/PSUSensor.hpp
index c0ebe6a..4ab553f 100644
--- a/include/PSUSensor.hpp
+++ b/include/PSUSensor.hpp
@@ -27,7 +27,7 @@
     boost::asio::deadline_timer waitTimer;
     boost::asio::streambuf readBuf;
     std::string path;
-    int errCount;
+    size_t errCount;
     unsigned int sensorFactor;
     void setupRead(void);
     void handleResponse(const boost::system::error_code& err);