diff --git a/nss-altfiles.spec b/nss-altfiles.spec
index b98df61..bcb1075 100644
--- a/nss-altfiles.spec
+++ b/nss-altfiles.spec
@@ -4,7 +4,7 @@
 Summary: NSS module to look up users in /usr/lib/passwd too
 Name: nss-altfiles
 Version: 2.18.1
-Release: 2%{?dist}
+Release: 3%{?dist}
 #VCS: https://github.com/aperezdc/nss-altfiles
 Source0: https://github.com/aperezdc/nss-altfiles/archive/v%{version}.tar.gz
 # From pull request: https://github.com/marineam/nss-altfiles/commit/dda5073238b88b4537f2d2707b0ef67bdd11fe06
@@ -23,7 +23,7 @@ in %{prefix}/lib/passwd, similarly, groups in %{prefix}/lib/group.
 %autosetup
 
 %build
-env CFLAGS=%{_optflags} ./configure --prefix=%{_prefix} --libdir=%{_libdir}
+./configure --prefix=%{_prefix} --libdir=%{_libdir} CFLAGS="%{optflags}"
 make %{?_smp_mflags}
 
 %install
@@ -38,6 +38,9 @@ make install DESTDIR=$RPM_BUILD_ROOT
 %postun -p /sbin/ldconfig
 
 %changelog
+* Wed May 28 2014 Ville Skyttä <ville.skytta@iki.fi> - 2.18.1-3
+- Build with $RPM_OPT_FLAGS
+
 * Tue Apr 08 2014 Colin Walters <walters@verbum.org>
 - Revert patch to link to libc, causes a dep on GLIBC_PRIVATE