diff --git a/components/gfx/text/glyph.rs b/components/gfx/text/glyph.rs
index 76a0c73e34b..763e8517297 100644
--- a/components/gfx/text/glyph.rs
+++ b/components/gfx/text/glyph.rs
@@ -723,7 +723,7 @@ impl<'a> GlyphStore {
         for index in range.each_index() {
             // TODO(pcwalton): Handle spaces that are detailed glyphs -- these are uncommon but
             // possible.
-            let mut entry = &mut self.entry_buffer[index.to_uint()];
+            let entry = &mut self.entry_buffer[index.to_uint()];
             if entry.is_simple() && entry.char_is_space() {
                 // FIXME(pcwalton): This can overflow for very large font-sizes.
                 let advance =
diff --git a/components/layout/inline.rs b/components/layout/inline.rs
index c864b56e111..45187d60c17 100644
--- a/components/layout/inline.rs
+++ b/components/layout/inline.rs
@@ -547,7 +547,7 @@ impl LineBreaker {
     /// Tries to append the given fragment to the line, splitting it if necessary. Returns true if
     /// we successfully pushed the fragment to the line or false if we couldn't.
     fn append_fragment_to_line_if_possible(&mut self,
-                                           mut fragment: Fragment,
+                                           fragment: Fragment,
                                            flow: &InlineFlow,
                                            layout_context: &LayoutContext,
                                            flags: InlineReflowFlags)
@@ -623,12 +623,12 @@ impl LineBreaker {
         // Push the first fragment onto the line we're working on and start off the next line with
         // the second fragment. If there's no second fragment, the next line will start off empty.
         match (inline_start_fragment, inline_end_fragment) {
-            (Some(inline_start_fragment), Some(mut inline_end_fragment)) => {
+            (Some(inline_start_fragment), Some(inline_end_fragment)) => {
                 self.push_fragment_to_line(layout_context, inline_start_fragment);
                 self.flush_current_line();
                 self.work_list.push_front(inline_end_fragment)
             },
-            (Some(mut fragment), None) => {
+            (Some(fragment), None) => {
                 self.push_fragment_to_line(layout_context, fragment);
             }
             (None, Some(_)) => debug_assert!(false, "un-normalized split result"),