diff --git a/libs/sofia-sip/libsofia-sip-ua/su/su_port.h b/libs/sofia-sip/libsofia-sip-ua/su/su_port.h
index 70937c3deb..90ab815907 100644
--- a/libs/sofia-sip/libsofia-sip-ua/su/su_port.h
+++ b/libs/sofia-sip/libsofia-sip-ua/su/su_port.h
@@ -420,9 +420,10 @@ su_timer_queue_t *su_port_deferrable(su_port_t *self)
 {
   su_virtual_port_t *base = (su_virtual_port_t *)self;
 
-  if (base == NULL)
-    return (intptr_t)(errno = EFAULT), NULL;
-
+  if (base == NULL) {
+	  errno = EFAULT;
+	  return NULL;
+  }
   return base->sup_vtable->su_port_deferrable(self);
 }