diff --git a/idl/idl_api.ysl2 b/idl/idl_api.ysl2
index 2afd337..f3e5fdd 100644
--- a/idl/idl_api.ysl2
+++ b/idl/idl_api.ysl2
@@ -1,3 +1,4 @@
+include standardlib.ysl2
 // ----------------------------------------------------------------------
 // stdlib candidates
 // ----------------------------------------------------------------------
@@ -19,6 +20,7 @@ def "func:exists" {
 // ----------------------------------------------------------------------
 // idl-api (ysl2)
 // ----------------------------------------------------------------------
+
 template "/" {
     choose {
         when "func:idl_static_analysis_is_ok()"