diff --git a/src/common/variant_helper.h b/src/common/variant_helper.h
index ecbca5a4..f0439db2 100644
--- a/src/common/variant_helper.h
+++ b/src/common/variant_helper.h
@@ -10,6 +10,7 @@
 #define VARIANT_CASE_TV(v_type) VARIANT_CASE(v_type, tv) 
 #define VARIANT_CASE_OTHER() } else { 
 #define VARIANT_CASE_THROW_ON_OTHER() } else { ASSERT_MES_AND_THROW("Unknown type in switch statemet: " << local_reference_eokcmeokmeokcm.type().name());
+#define VARIANT_CASE_THROW_ON_OTHER_MSG(err_msg) } else { ASSERT_MES_AND_THROW(err_msg << local_reference_eokcmeokmeokcm.type().name());
 
 #define VARIANT_SWITCH_END() } }