diff --git a/libavcodec/4xm.c b/libavcodec/4xm.c
index bf0241a8f4..85795f96ee 100644
--- a/libavcodec/4xm.c
+++ b/libavcodec/4xm.c
@@ -941,7 +941,7 @@ static av_cold int decode_init(AVCodecContext *avctx)
 
     if (avctx->extradata_size != 4 || !avctx->extradata) {
         av_log(avctx, AV_LOG_ERROR, "extradata wrong or missing\n");
-        return 1;
+        return AVERROR_INVALIDDATA;
     }
     if((avctx->width % 16) || (avctx->height % 16)) {
         av_log(avctx, AV_LOG_ERROR, "unsupported width/height\n");