diff --git a/libavcodec/avcodec.h b/libavcodec/avcodec.h
index 4ba0d6b2dd..23fba4fb6d 100644
--- a/libavcodec/avcodec.h
+++ b/libavcodec/avcodec.h
@@ -4608,7 +4608,7 @@ enum AVPixelFormat avcodec_find_best_pix_fmt_of_2(enum AVPixelFormat dst_pix_fmt
 
 attribute_deprecated
 #if AV_HAVE_INCOMPATIBLE_LIBAV_ABI
-enum AVPixelFormat avcodec_find_best_pix_fmt2(enum AVPixelFormat *pix_fmt_list,
+enum AVPixelFormat avcodec_find_best_pix_fmt2(const enum AVPixelFormat *pix_fmt_list,
                                               enum AVPixelFormat src_pix_fmt,
                                               int has_alpha, int *loss_ptr);
 #else
diff --git a/libavcodec/imgconvert.c b/libavcodec/imgconvert.c
index 42c75a55ba..d9dc55d325 100644
--- a/libavcodec/imgconvert.c
+++ b/libavcodec/imgconvert.c
@@ -248,7 +248,7 @@ enum AVPixelFormat avcodec_find_best_pix_fmt_of_2(enum AVPixelFormat dst_pix_fmt
 }
 
 #if AV_HAVE_INCOMPATIBLE_LIBAV_ABI
-enum AVPixelFormat avcodec_find_best_pix_fmt2(enum AVPixelFormat *pix_fmt_list,
+enum AVPixelFormat avcodec_find_best_pix_fmt2(const enum AVPixelFormat *pix_fmt_list,
                                             enum AVPixelFormat src_pix_fmt,
                                             int has_alpha, int *loss_ptr){
     return avcodec_find_best_pix_fmt_of_list(pix_fmt_list, src_pix_fmt, has_alpha, loss_ptr);