diff --git a/libavcodec/pictordec.c b/libavcodec/pictordec.c
index df3380ddda..a6ecd99d62 100644
--- a/libavcodec/pictordec.c
+++ b/libavcodec/pictordec.c
@@ -140,9 +140,9 @@ static int decode_frame(AVCodecContext *avctx,
 
     avctx->pix_fmt = AV_PIX_FMT_PAL8;
 
+    if (av_image_check_size(s->width, s->height, 0, avctx) < 0)
+        return -1;
     if (s->width != avctx->width && s->height != avctx->height) {
-        if (av_image_check_size(s->width, s->height, 0, avctx) < 0)
-            return -1;
         avcodec_set_dimensions(avctx, s->width, s->height);
     }