diff --git a/src/fast++.cpp b/src/fast++.cpp
index f697020..66205fc 100644
--- a/src/fast++.cpp
+++ b/src/fast++.cpp
@@ -28,6 +28,10 @@ const constexpr uint_t log_style::none;
 const constexpr uint_t log_style::decimal;
 const constexpr uint_t log_style::abmag;
 
+const constexpr uint_t lir_component::all;
+const constexpr uint_t lir_component::bc;
+const constexpr uint_t lir_component::cirrus;
+
 
 int vif_main(int argc, char* argv[]) {
     std::string param_file = (argc >= 2 ? argv[1] : "fast.param");