diff --git a/libavcodec/rv10.c b/libavcodec/rv10.c
index 1e5907433c..004c02d194 100644
--- a/libavcodec/rv10.c
+++ b/libavcodec/rv10.c
@@ -367,7 +367,7 @@ static int rv20_decode_picture_header(MpegEncContext *s)
         }
         if(new_w != s->width || new_h != s->height){
             av_log(s->avctx, AV_LOG_DEBUG, "attempting to change resolution to %dx%d\n", new_w, new_h);
-            if (avcodec_check_dimensions(s->avctx, new_h, new_w) < 0)
+            if (avcodec_check_dimensions(s->avctx, new_w, new_h) < 0)
                 return -1;
             MPV_common_end(s);
             avcodec_set_dimensions(s->avctx, new_w, new_h);