diff --git a/src/TDB2.cpp b/src/TDB2.cpp
index b95e50ed3..a370857d5 100644
--- a/src/TDB2.cpp
+++ b/src/TDB2.cpp
@@ -336,6 +336,7 @@ void TF2::load_lines ()
       _file.waitForLock ();
 
     _file.read (_lines);
+    _file.close ();
     _loaded_lines = true;
   }
 }