diff --git a/query/gremlin/build_iterator.go b/query/gremlin/build_iterator.go
index 938c428..1fd3b40 100644
--- a/query/gremlin/build_iterator.go
+++ b/query/gremlin/build_iterator.go
@@ -145,7 +145,8 @@ func buildInOutPredicateIterator(obj *otto.Object, qs graph.QuadStore, base grap
 		dir = quad.Object
 	}
 	lto := iterator.NewLinksTo(qs, base, dir)
-	return iterator.NewHasA(qs, lto, quad.Predicate)
+	hasa := iterator.NewHasA(qs, lto, quad.Predicate)
+	return iterator.NewUnique(hasa)
 }
 
 func buildIteratorTreeHelper(obj *otto.Object, qs graph.QuadStore, base graph.Iterator) graph.Iterator {
diff --git a/query/gremlin/gremlin_test.go b/query/gremlin/gremlin_test.go
index 74164a7..5c86b8f 100644
--- a/query/gremlin/gremlin_test.go
+++ b/query/gremlin/gremlin_test.go
@@ -251,6 +251,13 @@ var testQueries = []struct {
 		expect: []string{"bob", "greg"},
 	},
 	{
+		message: "list all bob's incoming predicates",
+		query: `
+		  g.V("bob").InPredicates().All()
+		`,
+		expect: []string{"follows"},
+	},
+	{
 		message: "list all in predicates",
 		query: `
 		  g.V().InPredicates().All()