diff --git a/hw/buffer_lock.c b/hw/buffer_lock.c
index b391edd..4b46c0e 100644
--- a/hw/buffer_lock.c
+++ b/hw/buffer_lock.c
@@ -44,10 +44,10 @@ void buffer_lock_capture(buffer_lock_t *buf_lock, buffer_t *buf)
   buf_lock->buf = buf;
   buf_lock->counter++;
   buf_lock->buf_time_us = get_monotonic_time_us(NULL, NULL);
-  uint64_t captured_time_s = get_time_us(CLOCK_FROM_PARAMS, NULL, &buf->v4l2_buffer.timestamp, 0);
-  E_LOG_DEBUG(buf_lock, "Captured buffer %s (refs=%d), frame=%d, delay=%llus",
+  uint64_t captured_time_us = get_time_us(CLOCK_FROM_PARAMS, NULL, &buf->v4l2_buffer.timestamp, 0);
+  E_LOG_DEBUG(buf_lock, "Captured buffer %s (refs=%d), frame=%d, delay=%.1f",
     dev_name(buf), buf ? buf->mmap_reflinks : 0, buf_lock->counter,
-    buf_lock->buf_time_us - captured_time_s);
+    (buf_lock->buf_time_us - captured_time_us) / 1000.0f);
   pthread_cond_broadcast(&buf_lock->cond_wait);
   pthread_mutex_unlock(&buf_lock->lock);
 }