diff --git a/pkg/sentry/fsutil/frame_ref_set.go b/pkg/sentry/fsutil/frame_ref_set.go
index 217090cad..1c68c17b9 100644
--- a/pkg/sentry/fsutil/frame_ref_set.go
+++ b/pkg/sentry/fsutil/frame_ref_set.go
@@ -22,6 +22,8 @@ import (
 )
 
 // FrameRefSegInfo holds reference count and memory cgroup id of the segment.
+//
+// +stateify savable
 type FrameRefSegInfo struct {
 	// refs indicates the reference count of the segment.
 	refs uint64