diff --git a/ivl.def b/ivl.def
index 3b47c23fc..ba57c2d2a 100644
--- a/ivl.def
+++ b/ivl.def
@@ -181,6 +181,7 @@ ivl_parameter_width
 ivl_path_condit
 ivl_path_delay
 ivl_path_is_condit
+ivl_path_is_parallel
 ivl_path_scope
 ivl_path_source
 ivl_path_source_negedge