1 files changed, 4 insertions, 2 deletions

diff --git a/src/caps.c b/src/caps.c
index 1821bd7..0788acf 100644
--- a/src/caps.c
+++ b/src/caps.c
@@ -83,8 +83,10 @@ static int read_caps(struct mtdev_caps *cap, int fd)
 
         cap->has_mtdata = has_mt_data(cap);
 
-        if (cap->has_abs[MTDEV_TRACKING_ID])
-                cap->nullid = cap->abs[MTDEV_TRACKING_ID].minimum - 1;
+        if (!cap->has_abs[MTDEV_TRACKING_ID]) {
+                cap->abs[MTDEV_TRACKING_ID].minimum = MT_ID_MIN;
+                cap->abs[MTDEV_TRACKING_ID].maximum = MT_ID_MAX;
+        }
 
         default_fuzz(cap, MTDEV_POSITION_X, SN_COORD);
         default_fuzz(cap, MTDEV_POSITION_Y, SN_COORD);