diff --git a/src/compiler/iml/imlparselet.rs b/src/compiler/iml/imlparselet.rs
index dc36603..0fee30e 100644
--- a/src/compiler/iml/imlparselet.rs
+++ b/src/compiler/iml/imlparselet.rs
@@ -143,7 +143,7 @@ impl std::fmt::Display for ImlParseletInstance {
         write!(
             f,
             "{}",
-            self.name.as_deref().unwrap_or("<anonymous parselet>")
+            self.name.as_deref().unwrap_or("__AnonymousParselet__")
         )?;
 
         if !self.generics.is_empty() {
@@ -248,7 +248,7 @@ impl ImlParselet {
         if !required.is_empty() {
             return Err(format!(
                 "{} requires assignment of generic argument {}",
-                instance.name.as_deref().unwrap_or("<anonymous parselet>"),
+                instance.name.as_deref().unwrap_or("__AnonymousParselet__"),
                 required.join(", ")
             ));
         }
diff --git a/src/compiler/iml/imlvalue.rs b/src/compiler/iml/imlvalue.rs
index 7608be8..6bd6e6d 100644
--- a/src/compiler/iml/imlvalue.rs
+++ b/src/compiler/iml/imlvalue.rs
@@ -434,7 +434,7 @@ impl std::fmt::Display for ImlValue {
                     .borrow()
                     .name
                     .as_deref()
-                    .unwrap_or("<anonymous parselet>")
+                    .unwrap_or("__AnonymousParselet__")
             ),
             Self::Variable {
                 name, is_global, ..