diff --git a/container/libcontainer/helpers.go b/container/libcontainer/helpers.go
index 560d8eb6..f2ceb2b7 100644
--- a/container/libcontainer/helpers.go
+++ b/container/libcontainer/helpers.go
@@ -193,7 +193,7 @@ func toContainerStats2(s *cgroups.Stats, ret *info.ContainerStats) {
 			workingSet -= v
 		}
 
-		if v, ok := s.MemoryStats.Stats["total_active_file"]; ok {
+		if v, ok := s.MemoryStats.Stats["total_inactive_file"]; ok {
 			if workingSet < v {
 				workingSet = 0
 			} else {