diff --git a/build/config/compiler/BUILD.gn b/build/config/compiler/BUILD.gn
index f8c602dfe04fa1..b2a8ea5f5bf6ae 100644
--- a/build/config/compiler/BUILD.gn
+++ b/build/config/compiler/BUILD.gn
@@ -145,7 +145,6 @@ config("optimize_default") {
 config("disabled_warnings") {
   cflags = [
     "-Wno-deprecated-declarations",
-    "-Wno-unknown-warning-option",
     "-Wno-missing-field-initializers",
     "-Wno-unused-parameter",
   ]
@@ -159,6 +158,9 @@ config("disabled_warnings") {
       "-Wno-cast-function-type",
     ]
   }
+  else {
+    cflags += [ "-Wno-unknown-warning-option" ]
+  }
 }
 
 config("strict_warnings") {