diff --git a/libavcodec/xan.c b/libavcodec/xan.c
index 52f3a3f64a..b90353967d 100644
--- a/libavcodec/xan.c
+++ b/libavcodec/xan.c
@@ -552,6 +552,9 @@ static int xan_decode_frame(AVCodecContext *avctx,
         }
         buf_size = buf_end - buf;
     }
+    if (s->palettes_count <= 0)
+        return AVERROR_INVALIDDATA;
+
     if ((ret = avctx->get_buffer(avctx, &s->current_frame))) {
         av_log(s->avctx, AV_LOG_ERROR, "get_buffer() failed\n");
         return ret;