diff --git a/BUILD.gn b/BUILD.gn
index ece2fd36ddc83b6f95ca5ddebfc472aab456eb56..46bbcdff8cb3db851170539d2726f6b3f45c0eca 100644
--- a/BUILD.gn
+++ b/BUILD.gn
@@ -20,8 +20,9 @@ config("libsoup_config") {
     "-DG_LOG_DOMAIN=\"libsoup\"",
     "-DLIBSOUP_COMPILATION",
     "-Wno-sign-compare",
-    "-Wno-pragma-messages",
+    "-Wno-#pragma-messages",
     "-DOHOS_GLIB_COMPATIBLE",
+    "-DOHOS_OPT_COMPAT",
   ]
 }
 
diff --git a/libsoup/soup-content-sniffer.c b/libsoup/soup-content-sniffer.c
index 967ec6141a3923e8cd531ddac568babc06362a56..76aab321c72f80e7888aa2822d283cb99c324504 100644
--- a/libsoup/soup-content-sniffer.c
+++ b/libsoup/soup-content-sniffer.c
@@ -638,8 +638,14 @@ sniff_feed_or_html (SoupContentSniffer *sniffer, SoupBuffer *buffer)
 		goto text_html;
 
 	/* Skip a leading UTF-8 BOM */
+	// x86_64 -Wtautological-constant-out-of-range-compare
+#ifdef OHOS_OPT_COMPAT
+	if (resource[0] == (char)0xEF && resource[1] == (char)0xBB && resource[2] == (char)0xBF)
+		pos = 3;
+#else 
 	if (resource[0] == 0xEF && resource[1] == 0xBB && resource[2] == 0xBF)
 		pos = 3;
+#endif
 
  look_for_tag:
 	if (pos > resource_length)