1 files changed, 2 insertions, 2 deletions
diff --git a/src/components/style/selector_matching.rs b/src/components/style/selector_matching.rs
index 0d861821e34..4c0f6a7898d 100644
--- a/src/components/style/selector_matching.rs
+++ b/src/components/style/selector_matching.rs
@@ -49,12 +49,12 @@ impl<'a> Hash for LowercaseAsciiString<'a> {
             // `Ascii` type's invariants by using `to_ascii_nocheck`, but it's OK as we simply
             // convert to a byte afterward.
             unsafe {
-                state.write_u8(b.to_ascii_nocheck().to_lower().to_byte())
+                state.write_u8(b.to_ascii_nocheck().to_lower().to_byte()).unwrap()
             };
         }
         // Terminate the string with a non-UTF-8 character, to match what the built-in string
         // `ToBytes` implementation does. (See `libstd/to_bytes.rs`.)
-        state.write_u8(0xff);
+        state.write_u8(0xff).unwrap();
     }
 }