diff --git a/gcc/rust/ast/rust-ast-dump.cc b/gcc/rust/ast/rust-ast-dump.cc
index 5dae38ccef9482234f1ea964d5605ad9c059ceaf..2f01c72460dbc4e96f78db98e193567e6effb8f4 100644
--- a/gcc/rust/ast/rust-ast-dump.cc
+++ b/gcc/rust/ast/rust-ast-dump.cc
@@ -1622,8 +1622,14 @@ Dump::visit (ParenthesisedType &)
 {}
 
 void
-Dump::visit (ImplTraitTypeOneBound &)
-{}
+Dump::visit (ImplTraitTypeOneBound &type)
+{
+  // Syntax:
+  //    impl TraitBound
+
+  stream << "impl ";
+  visit (type.get_trait_bound());
+}
 
 void
 Dump::visit (TraitObjectTypeOneBound &)