diff --git a/libavcodec/cbs.c b/libavcodec/cbs.c
index b045b73b68..7ff0f89aa5 100644
--- a/libavcodec/cbs.c
+++ b/libavcodec/cbs.c
@@ -967,7 +967,7 @@ static int cbs_clone_noncomplex_unit_content(void **clonep,
 {
     const uint8_t *src;
     uint8_t *copy;
-    int err, i;
+    int err;
 
     av_assert0(unit->content);
     src = unit->content;
@@ -982,7 +982,7 @@ static int cbs_clone_noncomplex_unit_content(void **clonep,
         *(ptr + 1) = NULL;
     }
 
-    for (i = 0; i < desc->type.ref.nb_offsets; i++) {
+    for (int i = 0; i < desc->type.ref.nb_offsets; i++) {
         const uint8_t *const *src_ptr = (const uint8_t* const*)(src + desc->type.ref.offsets[i]);
         const AVBufferRef *src_buf = *(AVBufferRef**)(src_ptr + 1);
         uint8_t **copy_ptr = (uint8_t**)(copy + desc->type.ref.offsets[i]);