diff --git a/src/state.hpp b/src/state.hpp
index 7f7af50f..b7905a51 100644
--- a/src/state.hpp
+++ b/src/state.hpp
@@ -103,6 +103,13 @@ public:
     {
     }
 
+    OpenFile(OpenFile &&o_) noexcept
+      : ref_count(o_.ref_count.load()),
+        backing_id(o_.backing_id),
+        fi(o_.fi)
+    {
+    }
+
     std::atomic<int> ref_count;
     int backing_id;
     FileInfo *fi;