diff --git a/webrtc/common_audio/BUILD.gn b/webrtc/common_audio/BUILD.gn
index f9bbd6a1dc..036daa1f9a 100644
--- a/webrtc/common_audio/BUILD.gn
+++ b/webrtc/common_audio/BUILD.gn
@@ -130,7 +130,7 @@ source_set("common_audio") {
   }
 
   if (is_win) {
-    cflags += [
+    cflags = [
       "/wd4334",  # Ignore warning on shift operator promotion.
     ]
   }