diff --git a/libavcodec/me_cmp.c b/libavcodec/me_cmp.c
index fe39009093..5cea792c95 100644
--- a/libavcodec/me_cmp.c
+++ b/libavcodec/me_cmp.c
@@ -473,7 +473,7 @@ static int zero_cmp(MpegEncContext *s, const uint8_t *a, const uint8_t *b,
     return 0;
 }
 
-int ff_set_cmp(MECmpContext *c, me_cmp_func *cmp, int type)
+int ff_set_cmp(const MECmpContext *c, me_cmp_func *cmp, int type)
 {
     int ret = 0;
     int i;
diff --git a/libavcodec/me_cmp.h b/libavcodec/me_cmp.h
index fee0ecb28e..14d19bd142 100644
--- a/libavcodec/me_cmp.h
+++ b/libavcodec/me_cmp.h
@@ -90,7 +90,7 @@ void ff_me_cmp_init_riscv(MECmpContext *c, AVCodecContext *avctx);
 void ff_me_cmp_init_x86(MECmpContext *c, AVCodecContext *avctx);
 void ff_me_cmp_init_mips(MECmpContext *c, AVCodecContext *avctx);
 
-int ff_set_cmp(MECmpContext *c, me_cmp_func *cmp, int type);
+int ff_set_cmp(const MECmpContext *c, me_cmp_func *cmp, int type);
 
 void ff_dsputil_init_dwt(MECmpContext *c);