diff --git a/ocaml-gettext-0.3.4-use-ocamlopt-g.patch b/ocaml-gettext-0.3.4-use-ocamlopt-g.patch
new file mode 100644
index 0000000..f8f05b5
--- /dev/null
+++ b/ocaml-gettext-0.3.4-use-ocamlopt-g.patch
@@ -0,0 +1,33 @@
+--- ocaml-gettext-0.3.4/TopMakefile.old	2013-09-14 08:54:04.713986462 +0100
++++ ocaml-gettext-0.3.4/TopMakefile	2013-09-14 08:54:18.319006115 +0100
+@@ -102,7 +102,7 @@
+ %.cmxa %.a %.so:
+ 	$(if $(STUBSOBJS),                            \
+ 	 $(OCAMLMKLIB)  -o $* $^ $(OCAMLMKLIB_FLAGS), \
+-	 $(OCAMLOPT) -a -o $*.cmxa $^                 \
++	 $(OCAMLOPT) -g -a -o $*.cmxa $^                 \
+ 	)
+ 
+ %.cma %.a %.so:
+@@ -161,7 +161,7 @@
+ OLIBS = $(addsuffix .cmxa,$(LIBS))
+ 
+ install-buildprog-opt: $(CMX)
+-	$(OCAMLOPT) -o $(NAME) $(INCLUDES) -package "$(REQUIRES)" -linkpkg \
++	$(OCAMLOPT) -g -o $(NAME) $(INCLUDES) -package "$(REQUIRES)" -linkpkg \
+ 	-predicates "$(PREDICATES)" $(OLIBS) $(CMX)
+ 	$(INSTALL) -d $(BUILDBIN) 
+ 	$(INSTALL_SCRIPT) -t $(BUILDBIN) $(NAME) 
+@@ -300,10 +300,10 @@
+ 	$(OCAMLC) $(INCLUDES) $(CLI_OCAMLFIND) -c $<
+ 
+ .ml.o:
+-	$(OCAMLOPT) $(INCLUDES) $(CLI_OCAMLFIND) -c $<
++	$(OCAMLOPT) -g $(INCLUDES) $(CLI_OCAMLFIND) -c $<
+ 	
+ .ml.cmx:
+-	$(OCAMLOPT) $(INCLUDES) $(CLI_OCAMLFIND) -c $<
++	$(OCAMLOPT) -g $(INCLUDES) $(CLI_OCAMLFIND) -c $<
+ 	
+ .mll.ml:
+ 	$(OCAMLLEX) $<
diff --git a/ocaml-gettext.spec b/ocaml-gettext.spec
index c44aeaa..fb10aa9 100644
--- a/ocaml-gettext.spec
+++ b/ocaml-gettext.spec
@@ -1,9 +1,8 @@
 %global opt %(test -x %{_bindir}/ocamlopt && echo 1 || echo 0)
-%global debug_package %{nil}
 
 Name:           ocaml-gettext
 Version:        0.3.4
-Release:        10%{?dist}
+Release:        11%{?dist}
 Summary:        OCaml library for i18n
 
 License:        LGPLv2+ with exceptions
@@ -12,6 +11,8 @@ ExcludeArch:    sparc64 s390 s390x
 
 Source0:        http://forge.ocamlcore.org/frs/download.php/676/ocaml-gettext-%{version}.tar.gz
 
+Patch1:         ocaml-gettext-0.3.4-use-ocamlopt-g.patch
+
 BuildRequires:  ocaml >= 4.00.1
 BuildRequires:  ocaml-findlib-devel >= 1.3.3-3
 BuildRequires:  ocaml-ocamldoc
@@ -88,8 +89,12 @@ signature files for developing applications that use
 %prep
 %setup -q
 
+%patch1 -p1
+
 
 %build
+# Parallel builds don't work.
+unset MAKEFLAGS
 CFLAGS="$RPM_OPT_FLAGS" \
 ./configure \
   --libdir=%{_libdir} \
@@ -129,9 +134,7 @@ ocamlfind install gettext-camomile _build/lib/gettext-camomile/*
 install -m 0755 _build/bin/ocaml-gettext $RPM_BUILD_ROOT%{_bindir}/
 install -m 0755 _build/bin/ocaml-xgettext $RPM_BUILD_ROOT%{_bindir}/
 
-strip $OCAMLFIND_DESTDIR/stublibs/dll*.so
 chrpath --delete $OCAMLFIND_DESTDIR/stublibs/dll*.so
-strip $RPM_BUILD_ROOT%{_bindir}/ocaml-gettext
 
 
 %files
@@ -195,6 +198,10 @@ strip $RPM_BUILD_ROOT%{_bindir}/ocaml-gettext
 
 
 %changelog
+* Sat Sep 14 2013 Richard W.M. Jones <rjones@redhat.com> - 0.3.4-11
+- Rebuild for OCaml 4.01.0.
+- Enable debuginfo.
+
 * Sat Aug 03 2013 Fedora Release Engineering <rel-eng@lists.fedoraproject.org> - 0.3.4-10
 - Rebuilt for https://fedoraproject.org/wiki/Fedora_20_Mass_Rebuild