diff --git a/src/typval.c b/src/typval.c
index 08dd231..da5d7af 100644
--- a/src/typval.c
+++ b/src/typval.c
@@ -92,6 +92,10 @@
 	    object_unref(varp->vval.v_object);
 	    break;
 
+	case VAR_TYPEALIAS:
+	    typealias_unref(varp->vval.v_typealias);
+	    break;
+
 	case VAR_NUMBER:
 	case VAR_FLOAT:
 	case VAR_ANY:
@@ -169,6 +173,10 @@
 	    object_unref(varp->vval.v_object);
 	    varp->vval.v_object = NULL;
 	    break;
+	case VAR_TYPEALIAS:
+	    typealias_unref(varp->vval.v_typealias);
+	    varp->vval.v_typealias = NULL;
+	    break;
 	case VAR_UNKNOWN:
 	case VAR_ANY:
 	case VAR_VOID:
@@ -262,6 +270,10 @@
 	case VAR_VOID:
 	    emsg(_(e_cannot_use_void_value));
 	    break;
+	case VAR_TYPEALIAS:
+	    semsg(_(e_using_typealias_as_variable),
+					varp->vval.v_typealias->ta_name);
+	    break;
 	case VAR_UNKNOWN:
 	case VAR_ANY:
 	case VAR_INSTR:
@@ -379,6 +391,10 @@
 	case VAR_VOID:
 	    emsg(_(e_cannot_use_void_value));
 	    break;
+	case VAR_TYPEALIAS:
+	    semsg(_(e_using_typealias_as_variable),
+					varp->vval.v_typealias->ta_name);
+	    break;
 	case VAR_UNKNOWN:
 	case VAR_ANY:
 	case VAR_INSTR:
@@ -1129,6 +1145,7 @@
 	case VAR_VOID:
 	    emsg(_(e_cannot_use_void_value));
 	    break;
+	case VAR_TYPEALIAS:
 	case VAR_UNKNOWN:
 	case VAR_ANY:
 	case VAR_INSTR:
@@ -1290,6 +1307,15 @@
 		++to->vval.v_dict->dv_refcount;
 	    }
 	    break;
+	case VAR_TYPEALIAS:
+	    if (from->vval.v_typealias == NULL)
+		to->vval.v_typealias = NULL;
+	    else
+	    {
+		to->vval.v_typealias = from->vval.v_typealias;
+		++to->vval.v_typealias->ta_refcount;
+	    }
+	    break;
 	case VAR_VOID:
 	    emsg(_(e_cannot_use_void_value));
 	    break;
@@ -1596,6 +1622,7 @@
 	    case VAR_FLOAT: if (!in_vim9script())
 				 return tv->vval.v_float == 0.0;
 			     break;
+	    case VAR_TYPEALIAS: return tv->vval.v_typealias == NULL;
 	    default: break;
 	}
     }
@@ -2069,6 +2096,9 @@
 	case VAR_FUNC:
 	    return tv1->vval.v_string == tv2->vval.v_string;
 
+	case VAR_TYPEALIAS:
+	    return tv1->vval.v_typealias == tv2->vval.v_typealias;
+
 	case VAR_UNKNOWN:
 	case VAR_ANY:
 	case VAR_VOID: