Add typename (needed by gcc 8).

1 files changed, 1 insertions, 1 deletions

diff --git a/eval/src/vespa/eval/eval/fast_value.hpp b/eval/src/vespa/eval/eval/fast_value.hpp
index eed10b59bf9..5657c93f53f 100644
--- a/eval/src/vespa/eval/eval/fast_value.hpp
+++ b/eval/src/vespa/eval/eval/fast_value.hpp
@@ -217,7 +217,7 @@ struct FastCells {
 template <typename T, bool transient>
 struct FastValue final : Value, ValueBuilder<T> {
 
-    using Handles = std::conditional<transient,
+    using Handles = typename std::conditional<transient,
                                      std::vector<string_id>,
                                      SharedStringRepo::Handles>::type;