diff --git a/Makefile b/Makefile
index a1de94d..f9e2eb8 100644
--- a/Makefile
+++ b/Makefile
@@ -1,8 +1,8 @@
 TARGET = sapic
-OBJS=lexer.cmo apip.cmo  firsttranslation.cmo main.cmo #secondtranslation.cmo thirdtranslation.cmo main.cmo
+OBJS=lexer.cmx apip.cmx firsttranslation.cmx main.cmx
 
 sapic: $(OBJS)
-	ocamlc -o $@ $(OBJS)
+	ocamlopt.opt -o $@ $(OBJS)
 
 depend:
 	ocamldep *.ml *.mli > .depend
@@ -13,17 +13,17 @@ clean:
 	rm -rf *.cmi *.cmo $(TARGET)
 	rm -rf apip.ml apip.mli lexer.ml lexer.mli
 
-.SUFFIXES: .ml .mli .mll .mly .cmo .cmi
+.SUFFIXES: .ml .mli .mll .mly .cmo .cmi .cmx
 
-.ml.cmo:
-	ocamlc -c $<
+.ml.cmx:
+	ocamlopt.opt -c $<
 .mli.cmi:
-	ocamlc -c $<
+	ocamlopt.opt -c $<
 .mll.ml:
 	ocamllex $<
 .mly.ml:
 	ocamlyacc $<
 .ml.mli:
-	ocamlc -i $< > $@
+	ocamlopt.opt -i $< > $@
 
 -include .depend