diff --git a/kernel/futex.c b/kernel/futex.c
index 794c862125feff034a231d4f16a5106189625d10..0672ff88f159f3041206750b3427fdd68aa0afc1 100644
--- a/kernel/futex.c
+++ b/kernel/futex.c
@@ -247,6 +247,7 @@ get_futex_key(u32 __user *uaddr, int fshared, union futex_key *key, int rw)
 	if (err < 0)
 		return err;
 
+	page = compound_head(page);
 	lock_page(page);
 	if (!page->mapping) {
 		unlock_page(page);