diff --git a/drivers/base/regmap/regcache.c b/drivers/base/regmap/regcache.c
index d81f60576e02..3ae8d9bafe68 100644
--- a/drivers/base/regmap/regcache.c
+++ b/drivers/base/regmap/regcache.c
@@ -605,7 +605,7 @@ static int regcache_sync_block_raw_flush(struct regmap *map, const void **data,
 	return ret;
 }
 
-int regcache_sync_block_raw(struct regmap *map, void *block,
+static int regcache_sync_block_raw(struct regmap *map, void *block,
 			    unsigned int block_base, unsigned int start,
 			    unsigned int end)
 {