diff --git a/BUILD.gn b/BUILD.gn
index 7f203c12d141a4b440070b05b3fbfc8c44eae500..0355a3d110b2c98a5361387454ddf8493fe408e6 100644
--- a/BUILD.gn
+++ b/BUILD.gn
@@ -22,7 +22,7 @@ config("libsoup_config") {
     "-Wno-sign-compare",
     "-Wno-#pragma-messages",
     "-DOHOS_GLIB_COMPATIBLE",
-    "-DOHOS_OPT_COMPAT",
+    "-fno-signed-char",
   ]
 }
 
diff --git a/libsoup/soup-content-sniffer.c b/libsoup/soup-content-sniffer.c
index aaf268d807552b2c03113838dff6fdd402b1ea5b..967ec6141a3923e8cd531ddac568babc06362a56 100644
--- a/libsoup/soup-content-sniffer.c
+++ b/libsoup/soup-content-sniffer.c
@@ -638,14 +638,8 @@ sniff_feed_or_html (SoupContentSniffer *sniffer, SoupBuffer *buffer)
 		goto text_html;
 
 	/* Skip a leading UTF-8 BOM */
-	// ohos.opt.compat.2001 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)