diff --git a/libs/util/include/psemek/util/hash_table.hpp b/libs/util/include/psemek/util/hash_table.hpp
index f1f13951..590e903a 100644
--- a/libs/util/include/psemek/util/hash_table.hpp
+++ b/libs/util/include/psemek/util/hash_table.hpp
@@ -655,7 +655,7 @@ namespace psemek::util
 		{
 			auto it = find(key);
 			if (it == end())
-				throw util::key_error<Key>(key);
+				throw util::key_error<Key>(Key(key));
 			return it->second;
 		}
 
@@ -672,7 +672,7 @@ namespace psemek::util
 		{
 			auto it = find(key);
 			if (it == end())
-				throw util::key_error<Key>(key);
+				throw util::key_error<Key>(Key(key));
 			return it->second;
 		}