diff --git a/external/modparser b/external/modparser
index ad8d926fd4a3e92cdcfb7b77c527550f859496d2..a3aa02b2888a23aa9dbd2244ef3709dd01fc6c31 160000
--- a/external/modparser
+++ b/external/modparser
@@ -1 +1 @@
-Subproject commit ad8d926fd4a3e92cdcfb7b77c527550f859496d2
+Subproject commit a3aa02b2888a23aa9dbd2244ef3709dd01fc6c31
diff --git a/src/util/range.hpp b/src/util/range.hpp
index 4fa8f25fe2650f126d9e1aac49716c9b08bf5e7a..2ed703df96ae92dd1d8130a64ff00fe7dddeb501 100644
--- a/src/util/range.hpp
+++ b/src/util/range.hpp
@@ -140,7 +140,7 @@ struct range {
         return is_forward_iterator<U>::value && left != right && std::next(left) != right;
     }
 
-    static const bool is_splittable_in_proportion() {
+    static constexpr bool is_splittable_in_proportion() {
         return is_forward_iterator<U>::value;
     }
 #endif