diff --git a/src/audio/speaker.c b/src/audio/speaker.c
index fdddfecc..6fe86c06 100644
--- a/src/audio/speaker.c
+++ b/src/audio/speaker.c
@@ -231,7 +231,7 @@ static void _submit_samples_buffer_fullspeed(void) {
     if (speakerBuffer->Lock(speakerBuffer, num_samples_pad*sizeof(int16_t), &system_samples_buffer, &system_buffer_size)) {
         return;
     }
-    assert(num_samples_pad*sizeof(int16_t) <= system_buffer_size);
+    assert(num_samples_pad <= system_buffer_size);
 
     //SPEAKER_LOG("bytes_queued:%d enqueueing %d quiet samples", bytes_queued, num_samples_pad);
     for (unsigned int i=0; i<num_samples_pad; i++) {