diff --git a/vlib/v/parser/fn.v b/vlib/v/parser/fn.v
index cd028fc836..294f94df47 100644
--- a/vlib/v/parser/fn.v
+++ b/vlib/v/parser/fn.v
@@ -307,6 +307,7 @@ fn (mut p Parser) anon_fn() ast.AnonFn {
 			is_anon: true
 			no_body: no_body
 			pos: pos
+			file: p.file_name
 		}
 		typ: typ
 	}