diff --git a/block.c b/block.c
index 0c807d15cd..31f13092cb 100644
--- a/block.c
+++ b/block.c
@@ -277,8 +277,8 @@ bool bdrv_is_read_only(BlockDriverState *bs)
     return !(bs->open_flags & BDRV_O_RDWR);
 }
 
-int bdrv_can_set_read_only(BlockDriverState *bs, bool read_only,
-                           bool ignore_allow_rdw, Error **errp)
+static int bdrv_can_set_read_only(BlockDriverState *bs, bool read_only,
+                                  bool ignore_allow_rdw, Error **errp)
 {
     IO_CODE();
 
diff --git a/include/block/block-io.h b/include/block/block-io.h
index 614cbd7eda..f9fa88204d 100644
--- a/include/block/block-io.h
+++ b/include/block/block-io.h
@@ -134,8 +134,6 @@ int bdrv_is_allocated_above(BlockDriverState *top, BlockDriverState *base,
 int coroutine_fn bdrv_co_is_zero_fast(BlockDriverState *bs, int64_t offset,
                                       int64_t bytes);
 
-int bdrv_can_set_read_only(BlockDriverState *bs, bool read_only,
-                           bool ignore_allow_rdw, Error **errp);
 int bdrv_apply_auto_read_only(BlockDriverState *bs, const char *errmsg,
                               Error **errp);
 bool bdrv_is_read_only(BlockDriverState *bs);