diff --git a/mm/memcontrol.c b/mm/memcontrol.c
index e0c2066495e3..7b5b108c1c6b 100644
--- a/mm/memcontrol.c
+++ b/mm/memcontrol.c
@@ -2542,6 +2542,7 @@ static u64 mem_cgroup_read(struct cgroup *cont, struct cftype *cft)
 			val += idx_val;
 			mem_cgroup_get_recursive_idx_stat(mem,
 				MEM_CGROUP_STAT_SWAPOUT, &idx_val);
+			val += idx_val;
 			val <<= PAGE_SHIFT;
 		} else
 			val = res_counter_read_u64(&mem->memsw, name);