diff --git a/libavcodec/dpx.c b/libavcodec/dpx.c
index 7355b50f7a..8c075fd538 100644
--- a/libavcodec/dpx.c
+++ b/libavcodec/dpx.c
@@ -612,6 +612,7 @@ static int decode_frame(AVCodecContext *avctx, AVFrame *p,
     av_dict_set(&p->metadata, "Input Device", input_device, 0);
 
     // Some devices do not pad 10bit samples to whole 32bit words per row
+    dpx->unpadded_10bit = 0;
     if (!memcmp(input_device, "Scanity", 7) ||
         !memcmp(creator, "Lasergraphics Inc.", 18)) {
         if (avctx->bits_per_raw_sample == 10)