diff --git a/compiler/loadcom.lisp b/compiler/loadcom.lisp
index 938b35c47d67440711763d4818535deca5ec4ac2..1054ae1f126cbabf7d95095aba9586f80d035e88 100644
--- a/compiler/loadcom.lisp
+++ b/compiler/loadcom.lisp
@@ -174,3 +174,5 @@
 	      (compact-info-environment (car *info-environment*))))
   (lisp::purify :root-structures '(ncompile-file))
   (ext:gc-on))
+
+#+pmax (%proclaim '(optimize (speed 1) (safety 1)))