diff --git a/qemu-char.c b/qemu-char.c
index 9165051f2aaef542384b2505e592b7000cab93e5..650943d27426d9642742cee93a5bf1f9666a1aaa 100644
--- a/qemu-char.c
+++ b/qemu-char.c
@@ -3328,7 +3328,7 @@ static int ringbuf_chr_write(CharDriverState *chr, const uint8_t *buf, int len)
         }
     }
 
-    return 0;
+    return len;
 }
 
 static int ringbuf_chr_read(CharDriverState *chr, uint8_t *buf, int len)