diff --git a/source/drivers/MicroBitCompass.cpp b/source/drivers/MicroBitCompass.cpp
index 0ce9442b..d46af22b 100644
--- a/source/drivers/MicroBitCompass.cpp
+++ b/source/drivers/MicroBitCompass.cpp
@@ -84,8 +84,8 @@ void MicroBitCompass::init(uint16_t id)
     this->samplePeriod = 100;
     this->configure();
 
-    // Assume that we have no calibration information.
-    status &= ~MICROBIT_COMPASS_STATUS_CALIBRATED;
+    // Assume that we have calibration information.
+    status |= MICROBIT_COMPASS_STATUS_CALIBRATED;
 
     // Indicate that we're up and running.
     status |= MICROBIT_COMPONENT_RUNNING;