diff --git a/src/PSUSensor.cpp b/src/PSUSensor.cpp
index 3c02b93..4d410fe 100644
--- a/src/PSUSensor.cpp
+++ b/src/PSUSensor.cpp
@@ -125,6 +125,11 @@
 void PSUSensor::activate(const std::string& newPath,
                          const std::shared_ptr<I2CDevice>& newI2CDevice)
 {
+    if (isActive())
+    {
+        // Avoid activating an active sensor
+        return;
+    }
     path = newPath;
     i2cDevice = newI2CDevice;
     inputDev.open(path, boost::asio::random_access_file::read_only);