diff --git a/drivers/dahdi/dahdi-base.c b/drivers/dahdi/dahdi-base.c
index 90166d5..bcd6147 100644
--- a/drivers/dahdi/dahdi-base.c
+++ b/drivers/dahdi/dahdi-base.c
@@ -7438,7 +7438,7 @@ static int _dahdi_register_device(struct dahdi_device *ddev,
 		__dahdi_init_span(s);
 	}
 
-	ktime_get_ts(&ddev->registration_time);
+	ddev->registration_time = ktime_get();
 	ret = dahdi_sysfs_add_device(ddev, parent);
 	if (ret)
 		return ret;
diff --git a/drivers/dahdi/dahdi-sysfs.c b/drivers/dahdi/dahdi-sysfs.c
index d1f2379..ca29ddb 100644
--- a/drivers/dahdi/dahdi-sysfs.c
+++ b/drivers/dahdi/dahdi-sysfs.c
@@ -654,10 +654,11 @@ dahdi_registration_time_show(struct device *dev,
 {
 	struct dahdi_device *ddev = to_ddev(dev);
 	int count = 0;
+	struct timespec64 ts = ktime_to_timespec64(ddev->registration_time);
 
-	count += sprintf(buf, "%010ld.%09ld\n",
-		ddev->registration_time.tv_sec,
-		ddev->registration_time.tv_nsec);
+	count += sprintf(buf, "%010lld.%09ld\n",
+		(s64)ts.tv_sec,
+		ts.tv_nsec);
 	return count;
 }
 
diff --git a/include/dahdi/kernel.h b/include/dahdi/kernel.h
index 2236f6d..22b9b66 100644
--- a/include/dahdi/kernel.h
+++ b/include/dahdi/kernel.h
@@ -907,7 +907,7 @@ struct dahdi_device {
 	const char *devicetype;
 	struct device dev;
 	unsigned int irqmisses;
-	struct timespec registration_time;
+	ktime_t registration_time;
 };
 
 struct dahdi_span {