diff --git a/src/pulse/stream.c b/src/pulse/stream.c
index 42d833225..0aa627396 100644
--- a/src/pulse/stream.c
+++ b/src/pulse/stream.c
@@ -1816,8 +1816,8 @@ static pa_usec_t calc_time(const pa_stream *s, bool ignore_transport) {
 }
 
 #ifdef USE_SMOOTHER_2
-static inline size_t calc_bytes(pa_stream *s, bool ignore_transport) {
-    return pa_usec_to_bytes(calc_time(s, ignore_transport), &s->sample_spec);
+static inline uint64_t calc_bytes(pa_stream *s, bool ignore_transport) {
+    return (uint64_t)(calc_time(s, ignore_transport) * s->sample_spec.rate / PA_USEC_PER_SEC * pa_frame_size(&s->sample_spec));
 }
 #endif
 
diff --git a/src/pulsecore/time-smoother_2.c b/src/pulsecore/time-smoother_2.c
index 8f4447e0c..e14b52f72 100644
--- a/src/pulsecore/time-smoother_2.c
+++ b/src/pulsecore/time-smoother_2.c
@@ -258,7 +258,7 @@ void pa_smoother_2_put(pa_smoother_2 *s, pa_usec_t time_stamp, int64_t byte_coun
 }
 
 /* Calculate the current latency. For a source, the sign must be inverted */
-int64_t pa_smoother_2_get_delay(pa_smoother_2 *s, pa_usec_t time_stamp, size_t byte_count) {
+int64_t pa_smoother_2_get_delay(pa_smoother_2 *s, pa_usec_t time_stamp, uint64_t byte_count) {
     int64_t now, delay;
 
     pa_assert(s);
diff --git a/src/pulsecore/time-smoother_2.h b/src/pulsecore/time-smoother_2.h
index 57fc1e31c..67b3c4815 100644
--- a/src/pulsecore/time-smoother_2.h
+++ b/src/pulsecore/time-smoother_2.h
@@ -37,7 +37,7 @@ void pa_smoother_2_resume(pa_smoother_2 *s, pa_usec_t time_stamp);
 void pa_smoother_2_put(pa_smoother_2 *s, pa_usec_t time_stamp, int64_t byte_count);
 
 /* Calculate the current latency. For a source, the sign of the result must be inverted */
-int64_t pa_smoother_2_get_delay(pa_smoother_2 *s, pa_usec_t time_stamp, size_t byte_count);
+int64_t pa_smoother_2_get_delay(pa_smoother_2 *s, pa_usec_t time_stamp, uint64_t byte_count);
 /* Convert system time since start to sound card time */
 pa_usec_t pa_smoother_2_get(pa_smoother_2 *s, pa_usec_t time_stamp);
 /* Convert a time interval from sound card time to system time */