diff --git a/libchewing.spec b/libchewing.spec
index a0631f7..472517a 100644
--- a/libchewing.spec
+++ b/libchewing.spec
@@ -6,7 +6,7 @@
 
 Name:           libchewing
 Version:        0.3.5
-Release:        1%{?dist}
+Release:        2%{?dist}
 Summary:        Intelligent phonetic input method library for Traditional Chinese
 Summary(zh_TW): %{name_zh_TW}
 
@@ -68,7 +68,7 @@ mkdir -p contrib/python
 cp -p %SOURCE1 contrib/python
 
 %build
-export CFLAGS=-DLIBINSTDIR='\"%{_libdir}\" -g'
+CFLAGS="%{optflags} -g -DLIBINSTDIR='%{_libdir}'"
 autoreconf -ivf
 %configure --disable-static
 make V=1 RPM_CFLAGS="%{optflags}" %{_smp_mflags}
@@ -115,10 +115,12 @@ fi
 %{libchewing_python_dir}
 
 %changelog
+* Tue Mar 04 2014 Ding-Yi Chen <dchen at redhat dot com> - 0.3.5-2
+- CFLAGS: added -fstack-protector-strong
+
 * Mon Oct 14 2013 Ding-Yi Chen <dchen at redhat dot com> - 0.3.5-1
 - Upstream update to 0.3.5
 
-
 * Mon Jul 29 2013 Parag Nemade <pnemade at redhat dot com> - 0.3.4-4
 - spec file cleanup to follow packaging guidelines