diff --git a/BUILD.gn b/BUILD.gn
index 758f1070db8b0003184713601205e3ce95601f6a..c916a285653cf01c3ccfb6e27dfe93fd82f9340e 100644
--- a/BUILD.gn
+++ b/BUILD.gn
@@ -221,6 +221,11 @@ ohos_shared_library("libselinux") {
     "-DAUDITD_LOG_TAG=1003",
     "-DPCRE2_CODE_UNIT_WIDTH=8",
   ]
+  if (host_cpu == "arm64") {
+    cflags += [
+      "-DWITH_FREEBSD"
+    ]
+  }
   deps = [ "$LIBPCRE2_ROOT_DIR:libpcre2" ]
   install_enable = true
   install_images = [