diff --git a/src/Simplex/Messaging/Crypto/File.hs b/src/Simplex/Messaging/Crypto/File.hs
index ab55a9198..789bdd509 100644
--- a/src/Simplex/Messaging/Crypto/File.hs
+++ b/src/Simplex/Messaging/Crypto/File.hs
@@ -21,6 +21,7 @@ module Simplex.Messaging.Crypto.File
   )
 where
 
+import Control.Concurrent.STM (stateTVar)
 import Control.Exception
 import Control.Monad.Except
 import Data.Aeson (FromJSON, ToJSON)