diff --git a/src/testdir/test_vim9_class.vim b/src/testdir/test_vim9_class.vim
index c73e80f..7e4c92d 100644
--- a/src/testdir/test_vim9_class.vim
+++ b/src/testdir/test_vim9_class.vim
@@ -349,6 +349,22 @@
       assert_equal('make = 123', c2.GetMake())
   END
   v9.CheckScriptSuccess(lines)
+
+  lines =<< trim END
+      vim9script
+
+      class MyCar
+        this.make: string
+
+        def new(make_arg: string)
+            this.make = make_arg
+        enddef
+      endclass
+
+      var c = MyCar.new("abc")
+      var c = MyCar.new("def")
+  END
+  v9.CheckScriptFailure(lines, 'E1041:')
 enddef
 
 def Test_class_member_access()
diff --git a/src/typval.c b/src/typval.c
index 98915cc..6eae02b 100644
--- a/src/typval.c
+++ b/src/typval.c
@@ -162,9 +162,11 @@
 		break;
 	    case VAR_CLASS:
 		class_unref(varp->vval.v_class);
+		varp->vval.v_class = NULL;
 		break;
 	    case VAR_OBJECT:
 		object_unref(varp->vval.v_object);
+		varp->vval.v_object = NULL;
 		break;
 	    case VAR_UNKNOWN:
 	    case VAR_ANY:
diff --git a/src/version.c b/src/version.c
index 95d2a6b..36d3f81 100644
--- a/src/version.c
+++ b/src/version.c
@@ -696,6 +696,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    1095,
+/**/
     1094,
 /**/
     1093,