diff --git a/php7.spec b/php7.spec
index ee52018..d0f555a 100644
--- a/php7.spec
+++ b/php7.spec
@@ -1373,7 +1373,7 @@ CFLAGS=`echo $CFLAGS|sed -e 's|-fPIE||g'`
 CXXFLAGS=`echo $CXXFLAGS|sed -e 's|-fPIE||g'`
 
 #export CFLAGS="`echo ${CFLAGS} | sed s/O2/O0/` -fPIC -L%{_libdir} -fno-strict-aliasing"
-export CFLAGS="${CFLAGS} -fPIC -L%{_libdir} -fno-strict-aliasing -Wno-incompatible-pointer-types"
+export CFLAGS="${CFLAGS} -fPIC -L%{_libdir} -fno-strict-aliasing -Wno-incompatible-pointer-types -std=c++17"
 export CXXFLAGS="${CFLAGS}"
 export RPM_OPT_FLAGS="${CFLAGS}"