diff --git a/src/util/optional.h b/src/util/optional.h
index 6fe9139b0c3a..f32b8b640213 100644
--- a/src/util/optional.h
+++ b/src/util/optional.h
@@ -7,6 +7,10 @@
 
 #else
 
+#ifdef __clang__
+#pragma clang diagnostic ignored "-Winvalid-constexpr"
+#endif
+
 #include <experimental/optional>
 
 namespace std {