diff --git a/grep.spec b/grep.spec
index ae051164c21b1f6ca629b1cf785e5a304d203ba8..fddf84d6c0ffba093681b9890b4d266c908adf87 100644
--- a/grep.spec
+++ b/grep.spec
@@ -1,6 +1,6 @@
 Name:    grep
 Version: 3.4
-Release: 0
+Release: 1
 Summary: A string search utility
 License: GPLv3+
 URL: http://www.gnu.org/software/grep/
@@ -18,7 +18,7 @@ a specified pattern. By default, Grep outputs the matching lines.
 
 %build
 %configure --without-included-regex --disable-silent-rules \
-CPPFLAGS="-I%{_includedir}/pcre" CFLAGS="$RPM_OPT_FLAGS"
+CPPFLAGS="-I%{_includedir}/pcre" CFLAGS="$RPM_OPT_FLAGS -fsigned-char"
 %make_build
 
 %install
@@ -44,6 +44,12 @@ make check
 
 
 %changelog
+* Wed Jul 15 2020 Liquor<lirui130@huawei.com> - 3.4-1
+- Type:bugfix
+- ID:NA
+- SUG:NA
+- DESC:add -fsigned-char option
+
 * Tue Jan  7 2020 JeanLeo<liujianliu.liu@huawei.com> - 3.4-0
 - Type:bugfix
 - ID:NA