diff --git a/src/TachSensor.cpp b/src/TachSensor.cpp
index 45ac7ac..46f5389 100644
--- a/src/TachSensor.cpp
+++ b/src/TachSensor.cpp
@@ -142,7 +142,7 @@
                 std::getline(responseStream, response);
                 float nvalue = std::stof(response);
                 responseStream.clear();
-                if (nvalue != value)
+                if (static_cast<double>(nvalue) != value)
                 {
                     updateValue(nvalue);
                 }