diff --git a/src/audio.c b/src/audio.c
index 41d0599..9e9224c 100644
--- a/src/audio.c
+++ b/src/audio.c
@@ -338,7 +338,7 @@ void audio_callback(void *userdata, uint8_t *stream, int len) {
     (void)userdata;
 
     /* prepare for mixing */
-    SDL_memset(stream, sizeof (uint16_t), len * ctx.audio_stream_channel_count);
+    SDL_memset(stream, 0, len);
 
     for (int i = 0; i < shlen(ctx.audio_channels); ++i) {
         sanity_check_channel(&ctx.audio_channels[i].value);