diff --git a/src/table/settings.h.preamble b/src/table/settings.h.preamble
index 8c670110b87..892df19f22e 100644
--- a/src/table/settings.h.preamble
+++ b/src/table/settings.h.preamble
@@ -69,7 +69,7 @@ constexpr T STUnwrap(T value)
 }
 
 template <typename T, std::enable_if_t<std::is_base_of<StrongTypedefBase, T>::value, int> = 0>
-constexpr T::BaseType STUnwrap(T value)
+constexpr typename T::BaseType STUnwrap(T value)
 {
 	return value.base();
 }