diff --git a/libswscale/swscale.c b/libswscale/swscale.c
index e89ebca066..7c29af42b4 100644
--- a/libswscale/swscale.c
+++ b/libswscale/swscale.c
@@ -274,7 +274,7 @@ static const AVOption options[] = {
 #undef VE
 #undef DEFAULT
 
-static AVClass sws_context_class = { "SWScaler", sws_context_to_name, options };
+static const AVClass sws_context_class = { "SWScaler", sws_context_to_name, options };
 
 const char *sws_format_name(enum PixelFormat format)
 {
diff --git a/libswscale/swscale_internal.h b/libswscale/swscale_internal.h
index 0370068122..5083c455b3 100644
--- a/libswscale/swscale_internal.h
+++ b/libswscale/swscale_internal.h
@@ -42,7 +42,7 @@ typedef struct SwsContext{
     /**
      * info on struct for av_log
      */
-    AVClass *av_class;
+    const AVClass *av_class;
 
     /**
      * Note that src, dst, srcStride, dstStride will be copied in the