diff --git a/src/protocol/ast.rs b/src/protocol/ast.rs
index 87e0135bc0e117077ba4a62a7682c557ca1ae55d..a0b2c384c1a9684c8d213a3c57621a4769c4200a 100644
--- a/src/protocol/ast.rs
+++ b/src/protocol/ast.rs
@@ -1838,7 +1838,7 @@ pub struct CallExpression {
 
 #[derive(Debug, Clone, PartialEq, Eq)]
 pub enum Method {
-    // Builtin, accessible by programmer
+    // Builtin function, accessible by programmer
     Get,
     Put,
     Fires,
@@ -1846,10 +1846,12 @@ pub enum Method {
     Length,
     Assert,
     Print,
-    // Builtin, not accessible by programmer
+    // Builtin function, not accessible by programmer
     SelectStart, // SelectStart(total_num_cases, total_num_ports)
     SelectRegisterCasePort, // SelectRegisterCasePort(case_index, port_index, port_id)
     SelectWait, // SelectWait() -> u32
+    // Builtin component,
+    ComponentRandomU32,
     // User-defined
     UserFunction,
     UserComponent,
@@ -1860,6 +1862,7 @@ impl Method {
         use Method::*;
         match self {
             Get | Put | Fires | Create | Length | Assert | Print => true,
+            ComponentRandomU32 => true,
             _ => false,
         }
     }