diff --git a/clutter/clutter-base-types.c b/clutter/clutter-base-types.c
index 62b55d7df..f5af8f138 100644
--- a/clutter/clutter-base-types.c
+++ b/clutter/clutter-base-types.c
@@ -1259,7 +1259,7 @@ clutter_rect_progress (const GValue *a,
   const ClutterRect *rect_b = g_value_get_boxed (b);
   ClutterRect res = CLUTTER_RECT_INIT_ZERO;
 
-#define INTERPOLATE(r_a,r_b,member,field,factor)     ((r_a)->member.field + (((r_b)->member.field - ((r_b)->member.field)) * (factor)))
+#define INTERPOLATE(r_a,r_b,member,field,factor)     ((r_a)->member.field + (((r_b)->member.field - ((r_a)->member.field)) * (factor)))
 
   res.origin.x = INTERPOLATE (rect_a, rect_b, origin, x, progress);
   res.origin.y = INTERPOLATE (rect_a, rect_b, origin, y, progress);
@@ -1269,8 +1269,6 @@ clutter_rect_progress (const GValue *a,
 
 #undef INTERPOLATE
 
-  clutter_rect_normalize_internal (&res);
-
   g_value_set_boxed (retval, &res);
 
   return TRUE;