diff --git a/src/lib/nccpp/constants.hpp b/src/lib/nccpp/constants.hpp
index be16a346f8b91a197e1c83c27c90503119fb3d50..0033f6122905721a59e61cc366a47c4ae3824c64 100644
--- a/src/lib/nccpp/constants.hpp
+++ b/src/lib/nccpp/constants.hpp
@@ -163,7 +163,10 @@ int constexpr suspend{KEY_SUSPEND};
 int constexpr undo{KEY_UNDO};
 int constexpr mouse{KEY_MOUSE};
 int constexpr resize{KEY_RESIZE};
+
+#ifdef KEY_EVENT
 int constexpr event{KEY_EVENT};
+#endif
 
 } // namespace keys