diff --git a/pkg/list/list.go b/pkg/list/list.go
index dadc398..3f86e1d 100644
--- a/pkg/list/list.go
+++ b/pkg/list/list.go
@@ -231,7 +231,7 @@
 func UniqueItems(a []cue.Value) bool {
 	b := []string{}
 	for _, v := range a {
-		b = append(b, fmt.Sprint(v))
+		b = append(b, fmt.Sprintf("%+v", v))
 	}
 	sort.Strings(b)
 	for i := 1; i < len(b); i++ {
diff --git a/pkg/list/testdata/list.txtar b/pkg/list/testdata/list.txtar
index 6291774..05f94e4 100644
--- a/pkg/list/testdata/list.txtar
+++ b/pkg/list/testdata/list.txtar
@@ -31,6 +31,16 @@
     t7: x: 1
     t8: x: [1, [2]]
 }
+unique: {
+	issue797: {
+		mylst: [
+			{ foo: "bar" },
+			{ foo: "baz" }
+		]
+
+		_testmylst: list.UniqueItems & [for x in mylst { x.foo } ]
+	}
+}
 -- out/list --
 Errors:
 error in call to list.Concat: cannot use value 1 (type int) as list
@@ -115,4 +125,13 @@
 		v: _|_ // error in call to list.Concat: cannot use value 1 (type int) as list (and 1 more errors)
 	}
 }
+unique: {
+	issue797: {
+		mylst: [{
+			foo: "bar"
+		}, {
+			foo: "baz"
+		}]
+	}
+}