diff --git a/hw/audio/marvell_88w8618.c b/hw/audio/marvell_88w8618.c
index 6d3ebbb0c8..c5c79d083a 100644
--- a/hw/audio/marvell_88w8618.c
+++ b/hw/audio/marvell_88w8618.c
@@ -66,7 +66,7 @@ static void mv88w8618_audio_callback(void *opaque, int free_out, int free_in)
 {
     mv88w8618_audio_state *s = opaque;
     int16_t *codec_buffer;
-    int8_t buf[4096];
+    QEMU_UNINITIALIZED int8_t buf[4096];
     int8_t *mem_buffer;
     int pos, block_size;