diff --git a/location/java/android/location/GnssClock.java b/location/java/android/location/GnssClock.java
index 25d247deff24d..671c57cb6ad92 100644
--- a/location/java/android/location/GnssClock.java
+++ b/location/java/android/location/GnssClock.java
@@ -332,6 +332,9 @@ public final class GnssClock implements Parcelable {
     /**
      * Gets the clock's Drift in nanoseconds per second.
      *
+     * <p>This value is the instantaneous time-derivative of the value provided by
+     * {@link #getBiasNanos()}.
+     *
      * <p>A positive value indicates that the frequency is higher than the nominal (e.g. GPS master
      * clock) frequency. The error estimate for this reported drift is
      * {@link #getDriftUncertaintyNanosPerSecond()}.