diff --git a/ocaml-camlimages.spec b/ocaml-camlimages.spec
index e419a95..e36c4f9 100644
--- a/ocaml-camlimages.spec
+++ b/ocaml-camlimages.spec
@@ -1,6 +1,8 @@
+%global opt %(test -x %{_bindir}/ocamlopt && echo 1 || echo 0)
+
 Name:           ocaml-camlimages
 Version:        4.1.0
-Release:        13%{?dist}
+Release:        14%{?dist}
 Summary:        OCaml image processing library
 
 Group:          Development/Libraries
@@ -72,7 +74,9 @@ cp -pr License.txt htmlref $RPM_BUILD_ROOT/usr/share/doc/ocaml-camlimages
 %doc README License.txt
 %{_libdir}/ocaml/camlimages
 %exclude %{_libdir}/ocaml/camlimages/*.a
+%if %{opt}
 %exclude %{_libdir}/ocaml/camlimages/*.cmxa
+%endif
 # There aren't any *.cmx files
 #%exclude %{_libdir}/ocaml/camlimages/*.cmx
 %exclude %{_libdir}/ocaml/camlimages/*.mli
@@ -83,13 +87,18 @@ cp -pr License.txt htmlref $RPM_BUILD_ROOT/usr/share/doc/ocaml-camlimages
 %files devel
 %doc htmlref
 %{_libdir}/ocaml/camlimages/*.a
+%if %{opt}
 %{_libdir}/ocaml/camlimages/*.cmxa
+%endif
 # There aren't any *.cmx files
 #%{_libdir}/ocaml/camlimages/*.cmx
 %{_libdir}/ocaml/camlimages/*.mli
 
 
 %changelog
+* Wed Jul 22 2015 Richard W.M. Jones <rjones@redhat.com> - 4.1.0-14
+- Enable bytecode compilation.
+
 * Wed Jun 24 2015 Richard W.M. Jones <rjones@redhat.com> - 4.1.0-13
 - ocaml-4.02.2 final rebuild.