diff --git a/dix/devices.c b/dix/devices.c
index 84a6406d1..0011be77c 100644
--- a/dix/devices.c
+++ b/dix/devices.c
@@ -49,6 +49,9 @@ SOFTWARE.
 #endif
 
 #include <X11/X.h>
+
+#include "dix/ptrveloc_priv.h"
+
 #include "misc.h"
 #include "resource.h"
 #include <X11/Xproto.h>
diff --git a/dix/ptrveloc.c b/dix/ptrveloc.c
index 632971ed9..fce97c3fe 100644
--- a/dix/ptrveloc.c
+++ b/dix/ptrveloc.c
@@ -27,6 +27,9 @@
 #endif
 
 #include <math.h>
+
+#include "dix/ptrveloc_priv.h"
+
 #include <ptrveloc.h>
 #include <exevents.h>
 #include <X11/Xatom.h>
diff --git a/dix/ptrveloc_priv.h b/dix/ptrveloc_priv.h
new file mode 100644
index 000000000..a4118cf65
--- /dev/null
+++ b/dix/ptrveloc_priv.h
@@ -0,0 +1,56 @@
+/* SPDX-License-Identifier: MIT OR X11
+ *
+ * Copyright © 2024 Enrico Weigelt, metux IT consult <info@metux.net>
+ * Copyright © 2006-2011 Simon Thum             simon dot thum at gmx dot de
+ */
+#ifndef _XSERVER_POINTERVELOCITY_PRIV_H
+#define _XSERVER_POINTERVELOCITY_PRIV_H
+
+#include <input.h>
+
+#include "ptrveloc.h"
+
+/* fwd */
+struct _DeviceVelocityRec;
+
+/**
+ * profile
+ * returns actual acceleration depending on velocity, acceleration control,...
+ */
+typedef double (*PointerAccelerationProfileFunc)
+ (DeviceIntPtr dev, struct _DeviceVelocityRec * vel,
+  double velocity, double threshold, double accelCoeff);
+
+/**
+ * a motion history, with just enough information to
+ * calc mean velocity and decide which motion was along
+ * a more or less straight line
+ */
+typedef struct _MotionTracker {
+    double dx, dy;              /* accumulated delta for each axis */
+    int time;                   /* time of creation */
+    int dir;                    /* initial direction bitfield */
+} MotionTracker, *MotionTrackerPtr;
+
+/**
+ * contains the run-time data for the predictable scheme, that is, a
+ * DeviceVelocityPtr and the property handlers.
+ */
+typedef struct _PredictableAccelSchemeRec {
+    DeviceVelocityPtr vel;
+    long *prop_handlers;
+    int num_prop_handlers;
+} PredictableAccelSchemeRec, *PredictableAccelSchemePtr;
+
+void AccelerationDefaultCleanup(DeviceIntPtr dev);
+
+Bool InitPredictableAccelerationScheme(DeviceIntPtr dev,
+                                       struct _ValuatorAccelerationRec *protoScheme);
+
+void acceleratePointerPredictable(DeviceIntPtr dev, ValuatorMask *val,
+                                  CARD32 evtime);
+
+void acceleratePointerLightweight(DeviceIntPtr dev, ValuatorMask *val,
+                                  CARD32 evtime);
+
+#endif /* _XSERVER_POINTERVELOCITY_PRIV_H */
diff --git a/include/ptrveloc.h b/include/ptrveloc.h
index 3bd982a90..a99416ee7 100644
--- a/include/ptrveloc.h
+++ b/include/ptrveloc.h
@@ -51,16 +51,7 @@ typedef double (*PointerAccelerationProfileFunc)
  (DeviceIntPtr dev, struct _DeviceVelocityRec * vel,
   double velocity, double threshold, double accelCoeff);
 
-/**
- * a motion history, with just enough information to
- * calc mean velocity and decide which motion was along
- * a more or less straight line
- */
-typedef struct _MotionTracker {
-    double dx, dy;              /* accumulated delta for each axis */
-    int time;                   /* time of creation */
-    int dir;                    /* initial direction bitfield */
-} MotionTracker, *MotionTrackerPtr;
+typedef struct _MotionTracker MotionTracker, *MotionTrackerPtr;
 
 /**
  * Contains all data needed to implement mouse ballistics
@@ -90,16 +81,6 @@ typedef struct _DeviceVelocityRec {
     } statistics;
 } DeviceVelocityRec, *DeviceVelocityPtr;
 
-/**
- * contains the run-time data for the predictable scheme, that is, a
- * DeviceVelocityPtr and the property handlers.
- */
-typedef struct _PredictableAccelSchemeRec {
-    DeviceVelocityPtr vel;
-    long *prop_handlers;
-    int num_prop_handlers;
-} PredictableAccelSchemeRec, *PredictableAccelSchemePtr;
-
 extern _X_EXPORT void
 InitVelocityData(DeviceVelocityPtr vel);
 
@@ -126,19 +107,4 @@ extern _X_EXPORT void
 SetDeviceSpecificAccelerationProfile(DeviceVelocityPtr vel,
                                      PointerAccelerationProfileFunc profile);
 
-extern _X_INTERNAL void
-AccelerationDefaultCleanup(DeviceIntPtr dev);
-
-extern _X_INTERNAL Bool
-InitPredictableAccelerationScheme(DeviceIntPtr dev,
-                                  struct _ValuatorAccelerationRec *protoScheme);
-
-extern _X_INTERNAL void
-acceleratePointerPredictable(DeviceIntPtr dev, ValuatorMask *val,
-                             CARD32 evtime);
-
-extern _X_INTERNAL void
-acceleratePointerLightweight(DeviceIntPtr dev, ValuatorMask *val,
-                             CARD32 evtime);
-
 #endif                          /* POINTERVELOCITY_H */