diff --git a/freenginx.sh b/freenginx.sh
index 0c0a312..f299ed3 100755
--- a/freenginx.sh
+++ b/freenginx.sh
@@ -258,7 +258,7 @@ run ./auto/configure \
   --with-openssl="../openssl-$V_QSSL" \
   --with-openssl-opt="$ssl_opt$ktls_opt" \
   "${mods[@]}" \
-  --with-cc-opt="-g -O2 -ffile-prefix-map=/data/builder/debuild/nginx-$V_NGINX/debian/debuild-base/nginx-$V_NGINX=. -flto=auto -ffat-lto-objects -fstack-protector-strong -Wformat -Werror=format-security -Wp,-D_FORTIFY_SOURCE=2 -fPIC -I../openssl-$V_QSSL/build/include" \
+  --with-cc-opt="-g -O2 -ffile-prefix-map=/data/builder/debuild/nginx-$V_NGINX/debian/debuild-base/nginx-$V_NGINX=. -flto=auto -ffat-lto-objects -fstack-protector-strong -Wformat -Werror=format-security -U_FORTIFY_SOURCE -D_FORTIFY_SOURCE=2 -fPIC -I../openssl-$V_QSSL/build/include" \
   --with-ld-opt="-Wl,-Bsymbolic-functions -flto=auto -ffat-lto-objects -Wl,-z,relro -Wl,-z,now -Wl,--as-needed -pie -L../openssl-$V_QSSL/build/lib"
 
 step "Compiling with $JOBS jobs (this takes a while)"