diff --git a/libavcodec/dnxhddata.c b/libavcodec/dnxhddata.c
index 3a69a0f501..e3b260f328 100644
--- a/libavcodec/dnxhddata.c
+++ b/libavcodec/dnxhddata.c
@@ -1105,14 +1105,6 @@ int avpriv_dnxhd_get_hr_frame_size(int cid, int w, int h)
     return FFMAX(result, 8192);
 }
 
-int avpriv_dnxhd_get_interlaced(int cid)
-{
-    const CIDEntry *entry = ff_dnxhd_get_cid_table(cid);
-    if (!entry)
-        return -1;
-    return entry->flags & DNXHD_INTERLACED ? 1 : 0;
-}
-
 static int dnxhd_find_hr_cid(AVCodecContext *avctx)
 {
     switch (avctx->profile) {
diff --git a/libavcodec/dnxhddata.h b/libavcodec/dnxhddata.h
index 898079cffc..ecb1cd0b2d 100644
--- a/libavcodec/dnxhddata.h
+++ b/libavcodec/dnxhddata.h
@@ -90,6 +90,5 @@ static av_always_inline uint64_t ff_dnxhd_parse_header_prefix(const uint8_t *buf
 
 int avpriv_dnxhd_get_frame_size(int cid);
 int avpriv_dnxhd_get_hr_frame_size(int cid, int w, int h);
-int avpriv_dnxhd_get_interlaced(int cid);
 
 #endif /* AVCODEC_DNXHDDATA_H */