diff --git a/src/cmd/compile/internal/noder/writer.go b/src/cmd/compile/internal/noder/writer.go
index 87c54b976943e..c57ccdf36db00 100644
--- a/src/cmd/compile/internal/noder/writer.go
+++ b/src/cmd/compile/internal/noder/writer.go
@@ -831,7 +831,7 @@ func (w *writer) doObj(wext *writer, obj types2.Object) pkgbits.CodeObj {
 	case *types2.TypeName:
 		if obj.IsAlias() {
 			w.pos(obj)
-			w.typ(obj.Type())
+			w.typ(types2.Unalias(obj.Type()))
 			return pkgbits.ObjAlias
 		}
 
diff --git a/test/fixedbugs/issue65778.go b/test/fixedbugs/issue65778.go
new file mode 100644
index 0000000000000..30c680404d91d
--- /dev/null
+++ b/test/fixedbugs/issue65778.go
@@ -0,0 +1,13 @@
+// compile -godebug gotypesalias=1
+
+// Copyright 2024 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package p
+
+type A = int
+
+type T[P any] *A
+
+var _ T[int]