diff --git a/src/common/messages.d b/src/common/messages.d
index 64c24d0..02a4f38 100644
--- a/src/common/messages.d
+++ b/src/common/messages.d
@@ -20,6 +20,7 @@ module common.messages;
 
 import std.socket;
 import msgpack;
+import core.time : dur;
 
 /**
  * The type of completion list being returned