diff --git a/dix/ptrveloc.c b/dix/ptrveloc.c
index 1245b7bfa..a79a83eee 100644
--- a/dix/ptrveloc.c
+++ b/dix/ptrveloc.c
@@ -690,8 +690,7 @@ QueryTrackers(DeviceVelocityPtr vel, int cur_t)
  * Perform velocity approximation based on 2D 'mickeys' (mouse motion delta).
  * return true if non-visible state reset is suggested
  */
-BOOL
-ProcessVelocityData2D(DeviceVelocityPtr vel, double dx, double dy, int time)
+static BOOL ProcessVelocityData2D(DeviceVelocityPtr vel, double dx, double dy, int time)
 {
     double velocity;
 
diff --git a/include/ptrveloc.h b/include/ptrveloc.h
index aa46c0191..024123ba5 100644
--- a/include/ptrveloc.h
+++ b/include/ptrveloc.h
@@ -81,9 +81,6 @@ typedef struct _DeviceVelocityRec {
     } statistics;
 } DeviceVelocityRec, *DeviceVelocityPtr;
 
-extern _X_EXPORT BOOL
-ProcessVelocityData2D(DeviceVelocityPtr vel, double dx, double dy, int time);
-
 extern _X_EXPORT double
 BasicComputeAcceleration(DeviceIntPtr dev, DeviceVelocityPtr vel,
                          double velocity, double threshold, double acc);