diff --git a/src/3rdparty/harfbuzz-ng/harfbuzz-ng.pro b/src/3rdparty/harfbuzz-ng/harfbuzz-ng.pro
index bd0475fc05..246c763fd6 100644
--- a/src/3rdparty/harfbuzz-ng/harfbuzz-ng.pro
+++ b/src/3rdparty/harfbuzz-ng/harfbuzz-ng.pro
@@ -3,7 +3,7 @@ TARGET = qtharfbuzzng
 CONFIG += \
     static \
     hide_symbols \
-    exceptions_off rtti_off
+    exceptions_off rtti_off warn_off
 
 load(qt_helper_lib)