diff --git a/server/gstreamer-encoder.c b/server/gstreamer-encoder.c
index e28ab00f..988d193d 100644
--- a/server/gstreamer-encoder.c
+++ b/server/gstreamer-encoder.c
@@ -511,7 +511,7 @@ static uint32_t get_min_playback_delay(SpiceGstEncoder *encoder)
      * an I frame) and an average frame. This also takes into account the
      * frames dropped by the encoder bit rate control.
      */
-    uint32_t size = get_maximum_frame_size(encoder) + get_average_frame_size(encoder);
+    uint64_t size = get_maximum_frame_size(encoder) + get_average_frame_size(encoder);
     uint32_t send_time = MSEC_PER_SEC * size * 8 / encoder->bit_rate;
 
     /* Also factor in the network latency with a margin for jitter. */