diff --git a/brltty.spec b/brltty.spec
index 8dc3eff..96dbdfb 100644
--- a/brltty.spec
+++ b/brltty.spec
@@ -16,7 +16,7 @@
 
 Name: brltty
 Version: %{pkg_version}
-Release: 11%{?dist}
+Release: 12%{?dist}
 License: GPLv2+
 Group: System Environment/Daemons
 URL: http://mielke.cc/brltty/
@@ -166,7 +166,8 @@ for i in -I/usr/lib/jvm/java/include{,/linux}; do
 done
 # there is no curses packages in BuildRequires, so the package builds
 # without them in mock; let's express this decision explicitly
-%configure CPPFLAGS="$java_inc" --disable-stripping --without-curses \
+%configure CPPFLAGS="$java_inc" CFLAGS="%{optflags} -fno-strict-aliasing" \
+  CXXFLAGS="%{optflags} -fno-strict-aliasing" --disable-stripping --without-curses \
 %if %{with_speech_dispatcher}
   --with-speechd=%{_prefix} \
 %endif
@@ -174,7 +175,7 @@ done
   JAVA_JAR_DIR=%{_jnidir} \
   JAVA_JNI_DIR=%{_libdir}/brltty \
   JAVA_JNI=yes
-  
+
 
 make %{?_smp_mflags}
 
@@ -319,6 +320,9 @@ exit 0
 %endif
 
 %changelog
+* Tue Jan  8 2013 Jaroslav Škarvada <jskarvad@redhat.com> - 4.3-12
+- Build with -fno-strict-aliasing
+
 * Wed Dec 19 2012 Stanislav Ochotnicky <sochotnicky@redhat.com> - 4.3-11
 - revbump after jnidir change