diff --git a/init.c b/init.c
index 80a8242..b003550 100644
--- a/init.c
+++ b/init.c
@@ -733,11 +733,11 @@ __objc_compute_ivar_offsets (Class class)
   if (class->instance_size <= 0)
     {
       Class super = class_superclass_of_class(class);
+      if (Nil == super) { return; }
       if (super->instance_size <= 0)
         {
           __objc_compute_ivar_offsets(super);
         }
-      if (Nil == super) { return; }
       long ivar_start = super->instance_size;
       class->instance_size = ivar_start - class->instance_size;
       /* For each instance variable, we add the offset if required (it will be zero