diff --git a/src/servo/gfx/color.rs b/src/servo/gfx/color.rs
index 5f6019b4eb3..8763b9ee7a7 100644
--- a/src/servo/gfx/color.rs
+++ b/src/servo/gfx/color.rs
@@ -12,7 +12,7 @@ pub fn rgba(r: u8, g: u8, b: u8, a: float) -> AzColor {
         r: (r as AzFloat) / (255.0 as AzFloat),
         g: (g as AzFloat) / (255.0 as AzFloat),
         b: (b as AzFloat) / (255.0 as AzFloat),
-        a: (a as AzFloat) / (255.0 as AzFloat)
+        a: a as AzFloat
     }
 }