1 files changed, 4 insertions, 1 deletions
diff --git a/xorg-server/include/ptrveloc.h b/xorg-server/include/ptrveloc.h
index 676c46419..6f999a88f 100644
--- a/xorg-server/include/ptrveloc.h
+++ b/xorg-server/include/ptrveloc.h
@@ -62,6 +62,9 @@ typedef struct _MotionTracker {
     int dir;        /* initial direction bitfield */
 } MotionTracker, *MotionTrackerPtr;
 
+/* number of properties for predictable acceleration */
+#define NPROPS_PREDICTABLE_ACCEL 4
+
 /**
  * Contains all data needed to implement mouse ballistics
  */
@@ -88,9 +91,9 @@ typedef struct _DeviceVelocityRec {
     struct {   /* to be able to query this information */
         int     profile_number;
     } statistics;
+    long    prop_handlers[NPROPS_PREDICTABLE_ACCEL];
 } DeviceVelocityRec, *DeviceVelocityPtr;
 
-
 extern _X_EXPORT void
 InitVelocityData(DeviceVelocityPtr vel);