diff --git a/drivers/hv/hv_balloon.c b/drivers/hv/hv_balloon.c
index bbc497373aaf21c392adcc760366116be50b82f6..f6c0011a0337e53ff783837a0970a2002675ddb5 100644
--- a/drivers/hv/hv_balloon.c
+++ b/drivers/hv/hv_balloon.c
@@ -545,7 +545,7 @@ static void post_status(struct hv_dynmem_device *dm)
 
 
 
-void free_balloon_pages(struct hv_dynmem_device *dm,
+static void free_balloon_pages(struct hv_dynmem_device *dm,
 			 union dm_mem_page_range *range_array)
 {
 	int num_pages = range_array->finfo.page_cnt;