diff --git a/BUILD.gn b/BUILD.gn
index 8bc7ee0eebb76348fa3a284ec98945cdfe6f271e..b4efc636808935641cfd7b2f10efb238bb645703 100644
--- a/BUILD.gn
+++ b/BUILD.gn
@@ -22,7 +22,7 @@ if (defined(ohos_lite)) {
     "cJSON_Utils.c",
   ]
 
-  if (board_chaintool_type == "iccarm") {
+  if (defined(board_toolchain_type) && board_toolchain_type == "iccarm") {
     cflags = [
       "--diag_suppress",
       "Pe513",