diff --git a/alacritty/src/display/content.rs b/alacritty/src/display/content.rs
index 72f71e9b..f4e34c10 100644
--- a/alacritty/src/display/content.rs
+++ b/alacritty/src/display/content.rs
@@ -303,7 +303,7 @@ impl RenderableCell {
     }
 
     /// Get the RGB color from a cell's foreground color.
-    fn compute_fg_rgb(content: &mut RenderableContent<'_>, fg: Color, flags: Flags) -> Rgb {
+    fn compute_fg_rgb(content: &RenderableContent<'_>, fg: Color, flags: Flags) -> Rgb {
         let config = &content.config;
         match fg {
             Color::Spec(rgb) => match flags & Flags::DIM {
@@ -351,7 +351,7 @@ impl RenderableCell {
 
     /// Get the RGB color from a cell's background color.
     #[inline]
-    fn compute_bg_rgb(content: &mut RenderableContent<'_>, bg: Color) -> Rgb {
+    fn compute_bg_rgb(content: &RenderableContent<'_>, bg: Color) -> Rgb {
         match bg {
             Color::Spec(rgb) => rgb.into(),
             Color::Named(ansi) => content.color(ansi as usize),
diff --git a/alacritty_terminal/src/vi_mode.rs b/alacritty_terminal/src/vi_mode.rs
index 7b4de605..d4f66d9e 100644
--- a/alacritty_terminal/src/vi_mode.rs
+++ b/alacritty_terminal/src/vi_mode.rs
@@ -243,7 +243,7 @@ fn first_occupied<T>(term: &Term<T>, mut point: Point) -> Point {
 
 /// Move by semantically separated word, like w/b/e/ge in vi.
 fn semantic<T: EventListener>(
-    term: &mut Term<T>,
+    term: &Term<T>,
     mut point: Point,
     direction: Direction,
     side: Side,
@@ -293,7 +293,7 @@ fn semantic<T: EventListener>(
 
 /// Move by whitespace separated word, like W/B/E/gE in vi.
 fn word<T: EventListener>(
-    term: &mut Term<T>,
+    term: &Term<T>,
     mut point: Point,
     direction: Direction,
     side: Side,