diff --git a/src/probabilistic/Topk.cc b/src/probabilistic/Topk.cc
index f870619e87..0de42bef47 100644
--- a/src/probabilistic/Topk.cc
+++ b/src/probabilistic/Topk.cc
@@ -191,9 +191,7 @@ IntrusivePtr<VectorVal> TopkVal::GetTopK(int k) const // returns vector
 		return nullptr;
 		}
 
-	auto vector_index = make_intrusive<TypeList>(type);
-	vector_index->Append(type);
-	auto v = make_intrusive<VectorType>(std::move(vector_index));
+	auto v = make_intrusive<VectorType>(type);
 	auto t = make_intrusive<VectorVal>(std::move(v));
 
 	// this does no estimation if the results is correct!
diff --git a/testing/btest/Baseline/bifs.topk/out b/testing/btest/Baseline/bifs.topk/out
index 48d7e23f96..52fb41c56d 100644
--- a/testing/btest/Baseline/bifs.topk/out
+++ b/testing/btest/Baseline/bifs.topk/out
@@ -1,4 +1,4 @@
-[b, c]
+[b, c], vector of string
 4
 0
 0
@@ -6,7 +6,7 @@
 0
 2
 1
-[d, c]
+[d, c], vector of string
 5
 0
 0
@@ -14,25 +14,25 @@
 1
 3
 2
-[d, e]
+[d, e], vector of string
 6
 3
 2
 3
 2
-[f, e]
+[f, e], vector of string
 7
 4
 3
 3
 2
-[f, e]
+[f, e], vector of string
 8
 4
 3
 4
 2
-[g, e]
+[g, e], vector of string
 9
 0
 0
@@ -40,7 +40,7 @@
 2
 5
 4
-[c, e, d]
+[c, e, d], vector of string
 19
 6
 0
@@ -48,14 +48,14 @@
 0
 4
 0
-[c, e]
+[c, e], vector of string
 6
 0
 5
 0
 0
 0
-[c, e]
+[c, e], vector of string
 22
 12
 0
@@ -63,7 +63,7 @@
 0
 0
 0
-[c, e]
+[c, e], vector of string
 19
 6
 0
@@ -71,7 +71,7 @@
 0
 4
 0
-[c, e, d]
+[c, e, d], vector of string
 38
 12
 0
diff --git a/testing/btest/bifs/topk.zeek b/testing/btest/bifs/topk.zeek
index 667107cbc0..9646eaab27 100644
--- a/testing/btest/bifs/topk.zeek
+++ b/testing/btest/bifs/topk.zeek
@@ -13,7 +13,7 @@ event zeek_init()
 	topk_add(k1, "c");
 
 	local s = topk_get_top(k1, 5);
-	print s;
+	print s, type_name(s);
 	print topk_sum(k1);
 	print topk_count(k1, "a");
 	print topk_epsilon(k1, "a");
@@ -24,7 +24,7 @@ event zeek_init()
  
 	topk_add(k1, "d");
 	s = topk_get_top(k1, 5);
-	print s;
+	print s, type_name(s);
 	print topk_sum(k1);
 	print topk_count(k1, "b");
 	print topk_epsilon(k1, "b");
@@ -35,7 +35,7 @@ event zeek_init()
 	
 	topk_add(k1, "e");
 	s = topk_get_top(k1, 5);
-	print s;
+	print s, type_name(s);
 	print topk_sum(k1);
 	print topk_count(k1, "d");
 	print topk_epsilon(k1, "d");
@@ -44,7 +44,7 @@ event zeek_init()
 	
 	topk_add(k1, "f");
 	s = topk_get_top(k1, 5);
-	print s;
+	print s, type_name(s);
 	print topk_sum(k1);
 	print topk_count(k1, "f");
 	print topk_epsilon(k1, "f");
@@ -53,7 +53,7 @@ event zeek_init()
 	
 	topk_add(k1, "e");
 	s = topk_get_top(k1, 5);
-	print s;
+	print s, type_name(s);
 	print topk_sum(k1);
 	print topk_count(k1, "f");
 	print topk_epsilon(k1, "f");
@@ -62,7 +62,7 @@ event zeek_init()
 
 	topk_add(k1, "g");
 	s = topk_get_top(k1, 5);
-	print s;
+	print s, type_name(s);
 	print topk_sum(k1);
 	print topk_count(k1, "f");
 	print topk_epsilon(k1, "f");
@@ -92,7 +92,7 @@ event zeek_init()
 	topk_add(k1, "e");
 	topk_add(k1, "f");
 	s = topk_get_top(k1, 3);
-	print s;
+	print s, type_name(s);
 	print topk_sum(k1);
 	print topk_count(k1, "c");
 	print topk_epsilon(k1, "c");
@@ -105,7 +105,7 @@ event zeek_init()
 	topk_merge_prune(k3, k1);
 
 	s = topk_get_top(k3, 3);
-	print s;
+	print s, type_name(s);
 	print topk_count(k3, "c");
 	print topk_epsilon(k3, "c");
 	print topk_count(k3, "e");
@@ -116,7 +116,7 @@ event zeek_init()
 	topk_merge_prune(k3, k1);
 
 	s = topk_get_top(k3, 3);
-	print s;
+	print s, type_name(s);
 	print topk_sum(k3); # this gives a warning and a wrong result.
 	print topk_count(k3, "c");
 	print topk_epsilon(k3, "c");
@@ -127,7 +127,7 @@ event zeek_init()
 
 	k3 = topk_init(2);
 	topk_merge(k3, k1);
-	print s;
+	print s, type_name(s);
 	print topk_sum(k3);
 	print topk_count(k3, "c");
 	print topk_epsilon(k3, "c");
@@ -139,7 +139,7 @@ event zeek_init()
 	topk_merge(k3, k1);
 
 	s = topk_get_top(k3, 3);
-	print s;
+	print s, type_name(s);
 	print topk_sum(k3);
 	print topk_count(k3, "c");
 	print topk_epsilon(k3, "c");