diff --git a/src/html.rs b/src/html.rs
index aa5f2c34..28a15da5 100644
--- a/src/html.rs
+++ b/src/html.rs
@@ -112,7 +112,7 @@ impl<'a> ClassedHTMLGenerator<'a> {
     /// but this function can't be changed without breaking compatibility so is deprecated.
     #[deprecated(since="4.5.0", note="Please use `parse_html_for_line_which_includes_newline` instead")]
     pub fn parse_html_for_line(&mut self, line: &str) {
-        self.parse_html_for_line_which_includes_newline(line).unwrap();
+        self.parse_html_for_line_which_includes_newline(line).expect("Please use `parse_html_for_line_which_includes_newline` instead");
         // retain newline
         self.html.push('\n');
     }