diff --git a/libavformat/sierravmd.c b/libavformat/sierravmd.c
index 52f05826d503a2bedf1d560f1925d09d240f7207..5aa5a04dbb67f68ac7fb017c9d8b6e7130d09449 100644
--- a/libavformat/sierravmd.c
+++ b/libavformat/sierravmd.c
@@ -154,7 +154,7 @@ static int vmd_read_header(AVFormatContext *s,
     vmd->frame_table = NULL;
     sound_buffers = AV_RL16(&vmd->vmd_header[808]);
     raw_frame_table_size = vmd->frame_count * 6;
-    if(vmd->frame_count * vmd->frames_per_block  >= UINT_MAX / sizeof(vmd_frame)){
+    if(vmd->frame_count * vmd->frames_per_block  >= (UINT_MAX - sound_buffers) / sizeof(vmd_frame)){
         av_log(s, AV_LOG_ERROR, "vmd->frame_count * vmd->frames_per_block too large\n");
         return -1;
     }