diff --git a/src/name_canonicalization.cpp b/src/name_canonicalization.cpp
index 8bacfabc6..edadde35e 100644
--- a/src/name_canonicalization.cpp
+++ b/src/name_canonicalization.cpp
@@ -756,6 +756,14 @@ gb_internal void write_type_to_canonical_string(TypeWriter *w, Type *type) {
 			if (i > 0) {
 				type_writer_appendc(w, CANONICAL_FIELD_SEPARATOR);
 			}
+
+			if (f->flags & EntityFlags_IsSubtype) {
+				type_writer_appendc(w, "#subtype ");
+			}
+
+			if (f->flags & EntityFlag_Using) {
+				type_writer_appendc(w, "using ");
+			}
 			type_writer_append(w, f->token.string.text, f->token.string.len);
 			type_writer_appendc(w, CANONICAL_TYPE_SEPARATOR);
 			write_type_to_canonical_string(w, f->type);