diff --git a/src/state.hpp b/src/state.hpp
index bccd258c..1d1ba5ff 100644
--- a/src/state.hpp
+++ b/src/state.hpp
@@ -40,7 +40,6 @@ public:
     }
 
     int ref_count;
-    int backing_id;
     DirInfo *di;
   };