diff --git a/vlib/v/scanner/scanner.v b/vlib/v/scanner/scanner.v
index 324f623124..674a55627c 100644
--- a/vlib/v/scanner/scanner.v
+++ b/vlib/v/scanner/scanner.v
@@ -580,7 +580,7 @@ fn (mut s Scanner) text_scan() token.Token {
 			}
 			// end of `$expr`
 			// allow `'$a.b'` and `'$a.c()'`
-			if s.is_inter_start && next_char == `\\` && s.look_ahead(2) !in [`x`, `n`, `r`, `\\`, `t`] {
+			if s.is_inter_start && next_char == `\\` && s.look_ahead(2) !in [`x`, `n`, `r`, `\\`, `t`, `e`] {
 				s.warn('unknown escape sequence \\${s.look_ahead(2)}')
 			}
 			if s.is_inter_start && next_char == `(` {