diff --git a/festival.spec b/festival.spec
index ef35ba1..a30e797 100644
--- a/festival.spec
+++ b/festival.spec
@@ -1,6 +1,6 @@
 Name:           festival
 Version:        1.96
-Release:        43
+Release:        44
 Summary:        Festival Speech Synthesis System
 License:        MIT and GPL+ and TCL
 URL:            http://www.cstr.ed.ac.uk/projects/festival/
@@ -182,7 +182,7 @@ pushd speech_tools
   %configure
   make \
     CFLAGS="$RPM_OPT_FLAGS -fPIC -fno-strict-aliasing" \
-    CXXFLAGS="$RPM_OPT_FLAGS  -fPIC -fno-strict-aliasing"
+    CXXFLAGS="$RPM_OPT_FLAGS  -fPIC -fno-strict-aliasing -fno-delete-null-pointer-checks -std=gnu++98"
 popd
 
 export LD_LIBRARY_PATH=$LD_LIBRARY_PATH:$(pwd)/src/lib
@@ -191,8 +191,7 @@ export PATH=$(pwd)/bin:$PATH
 make \
   FTLIBDIR="%{_datadir}/festival/lib" \
   CFLAGS="$RPM_OPT_FLAGS -fPIC" \
-  CXXFLAGS="$RPM_OPT_FLAGS -fPIC"
-
+  CXXFLAGS="$RPM_OPT_FLAGS -fPIC -fno-delete-null-pointer-checks -std=gnu++98"
 pushd lib/dicts/cmu
   make
 popd
@@ -354,6 +353,9 @@ fi
 %{_mandir}/man1/*
 
 %changelog
+* Tue Mar 15 2022 yaoxin <yaoxin30@huawei.com> - 1.96-44
+- Use C++98 and disable NULL pointer check optimizations
+
 * Tue Mar 15 2022 yaoxin <yaoxin30@huawei.com> - 1.96-43
 - Fix CVE-2010-3996