diff --git a/libavutil/frame.c b/libavutil/frame.c
index bac6c63980..a06d525606 100644
--- a/libavutil/frame.c
+++ b/libavutil/frame.c
@@ -562,7 +562,7 @@ AVFrameSideData *av_frame_new_side_data(AVFrame *frame,
     return ret;
 }
 
-AVFrameSideData *av_frame_get_side_data(AVFrame *frame,
+AVFrameSideData *av_frame_get_side_data(const AVFrame *frame,
                                         enum AVFrameSideDataType type)
 {
     int i;
diff --git a/libavutil/frame.h b/libavutil/frame.h
index 8cb3000aaa..ac4057bc6f 100644
--- a/libavutil/frame.h
+++ b/libavutil/frame.h
@@ -644,7 +644,7 @@ AVFrameSideData *av_frame_new_side_data(AVFrame *frame,
  * @return a pointer to the side data of a given type on success, NULL if there
  * is no side data with such type in this frame.
  */
-AVFrameSideData *av_frame_get_side_data(AVFrame *frame,
+AVFrameSideData *av_frame_get_side_data(const AVFrame *frame,
                                         enum AVFrameSideDataType type);
 
 #endif /* AVUTIL_FRAME_H */