diff --git a/libavcodec/avdct.c b/libavcodec/avdct.c
index 720e7720de..58f4974b49 100644
--- a/libavcodec/avdct.c
+++ b/libavcodec/avdct.c
@@ -70,6 +70,11 @@ static const AVClass avdct_class = {
     .version                 = LIBAVUTIL_VERSION_INT,
 };
 
+const AVClass *avcodec_dct_get_class(void)
+{
+    return &avdct_class;
+}
+
 AVDCT *avcodec_dct_alloc(void)
 {
     AVDCT *dsp = av_mallocz(sizeof(AVDCT));
diff --git a/libavcodec/avdct.h b/libavcodec/avdct.h
index 4d691e013d..4c9d00f904 100644
--- a/libavcodec/avdct.h
+++ b/libavcodec/avdct.h
@@ -73,4 +73,6 @@ typedef struct AVDCT {
 AVDCT *avcodec_dct_alloc(void);
 int avcodec_dct_init(AVDCT *);
 
+const AVClass *avcodec_dct_get_class(void);
+
 #endif /* AVCODEC_AVDCT_H */