diff --git a/src/font.rs b/src/font.rs
index d0305e7..747a547 100644
--- a/src/font.rs
+++ b/src/font.rs
@@ -307,11 +307,11 @@ impl CTFont {
     pub fn get_bounding_rects_for_glyphs(&self, orientation: CTFontOrientation, glyphs: &[CGGlyph])
                                          -> CGRect {
         unsafe {
-            let mut result = CTFontGetBoundingRectsForGlyphs(self.as_concrete_TypeRef(),
-                                                             orientation,
-                                                             glyphs.as_ptr(),
-                                                             ptr::null_mut(),
-                                                             glyphs.len() as CFIndex);
+            let result = CTFontGetBoundingRectsForGlyphs(self.as_concrete_TypeRef(),
+                                                         orientation,
+                                                         glyphs.as_ptr(),
+                                                         ptr::null_mut(),
+                                                         glyphs.len() as CFIndex);
             result
         }
     }