diff --git a/src/mbgl/util/http_header.cpp b/src/mbgl/util/http_header.cpp
index 8048dfe84..4d9e2bf84 100644
--- a/src/mbgl/util/http_header.cpp
+++ b/src/mbgl/util/http_header.cpp
@@ -7,7 +7,9 @@
 #pragma GCC diagnostic ignored "-Wunused-parameter"
 #pragma GCC diagnostic ignored "-Wshadow"
 #pragma clang diagnostic push
+
 #pragma clang diagnostic ignored "-Wshorten-64-to-32"
+#pragma clang diagnostic ignored "-Wunknown-warning-option"
 #pragma clang diagnostic ignored "-Wtautological-constant-compare"
 #include <boost/spirit/include/qi.hpp>
 #include <boost/spirit/include/phoenix_core.hpp>