diff --git a/ChangeLog b/ChangeLog
index 25a2c13..84f77bf 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,7 @@
+User johns
+
+    Fix bug: used frame-> instead of video_ctx-> for old libav/ffmpeg.
+
 User johns
 Date: Mon Feb 13 23:20:26 CET 2012
 
diff --git a/video.c b/video.c
index 26bdacf..234350a 100644
--- a/video.c
+++ b/video.c
@@ -6819,7 +6819,7 @@ static void VdpauRenderFrame(VdpauDecoder * decoder,
     }
 #else
     if (decoder->InputWidth && decoder->InputHeight
-	&& av_cmp_q(decoder->InputAspect, frame->sample_aspect_ratio)) {
+	&& av_cmp_q(decoder->InputAspect, video_ctx->sample_aspect_ratio)) {
 	Debug(3, "video/vdpau: aspect ratio changed\n");
 
 	decoder->InputAspect = video_ctx->sample_aspect_ratio;