diff --git a/vlib/v/scanner/scanner.v b/vlib/v/scanner/scanner.v
index be14872295..175ad58cb6 100644
--- a/vlib/v/scanner/scanner.v
+++ b/vlib/v/scanner/scanner.v
@@ -779,6 +779,10 @@ fn (mut s Scanner) text_scan() token.Token {
 			return s.new_token(.lpar, '', 1)
 		}
 		`)` {
+			// TODO `$if vet {` for performance
+			if s.pref.is_vet && s.text[s.pos - 1] == ` ` {
+				println('$s.file_path:$s.line_nr: Looks like you are adding a space before `)`')
+			}
 			return s.new_token(.rpar, '', 1)
 		}
 		`[` {