diff --git a/clutter/clutter-behaviour-opacity.c b/clutter/clutter-behaviour-opacity.c
index 934c18d6f..ee52422aa 100644
--- a/clutter/clutter-behaviour-opacity.c
+++ b/clutter/clutter-behaviour-opacity.c
@@ -91,14 +91,14 @@ clutter_behaviour_alpha_notify (ClutterBehaviour *behave,
                                 guint32           alpha_value)
 {
   ClutterBehaviourOpacityPrivate *priv;
-  guint8 delta, opacity;
+  guint8 opacity;
 
   priv = CLUTTER_BEHAVIOUR_OPACITY (behave)->priv;
 
-  delta = priv->opacity_end - priv->opacity_start;
-
-  opacity = alpha_value * delta / CLUTTER_ALPHA_MAX_ALPHA;
-  opacity += priv->opacity_start; 
+  opacity = alpha_value
+            * (priv->opacity_end - priv->opacity_start)
+            / CLUTTER_ALPHA_MAX_ALPHA
+            + priv->opacity_start;
 
   CLUTTER_NOTE (BEHAVIOUR, "alpha: %i, opacity: %i", alpha_value, opacity);