diff --git a/libavcodec/dovi_rpuenc.c b/libavcodec/dovi_rpuenc.c
index 334b2c98a0..2e1f8be08e 100644
--- a/libavcodec/dovi_rpuenc.c
+++ b/libavcodec/dovi_rpuenc.c
@@ -31,7 +31,7 @@
 #include "put_golomb.h"
 #include "libavutil/refstruct.h"
 
-static struct {
+static const struct {
     uint64_t pps; // maximum pixels per second
     int width; // maximum width
     int main; // maximum bitrate in main tier