diff --git a/service.go b/service.go
index 1ea0320..5a483a9 100644
--- a/service.go
+++ b/service.go
@@ -423,7 +423,7 @@ func (service *Service) ResolveTXTRecords(name string) (ResolveTXTResult, bool)
 		return ResolveTXTResult{}, false
 	}
 	return ResolveTXTResult{
-		TXT: append([]string(nil), record.TXT...),
+		TXT: cloneStrings(record.TXT),
 	}, true
 }
 
@@ -573,10 +573,10 @@ func (service *Service) findRecord(name string) (NameRecords, bool) {
 
 func resolveResult(record NameRecords) ResolveAllResult {
 	return ResolveAllResult{
-		A:    append([]string(nil), record.A...),
-		AAAA: append([]string(nil), record.AAAA...),
-		TXT:  append([]string(nil), record.TXT...),
-		NS:   append([]string(nil), record.NS...),
+		A:    cloneStrings(record.A),
+		AAAA: cloneStrings(record.AAAA),
+		TXT:  cloneStrings(record.TXT),
+		NS:   cloneStrings(record.NS),
 	}
 }
 
@@ -699,6 +699,13 @@ func serializeRecordValues(values []string) string {
 	return strings.Join(copied, ",")
 }
 
+func cloneStrings(values []string) []string {
+	if len(values) == 0 {
+		return []string{}
+	}
+	return append([]string(nil), values...)
+}
+
 func findWildcardMatch(name string, records map[string]NameRecords) (NameRecords, bool) {
 	bestMatch := ""
 	for candidate := range records {
diff --git a/service_test.go b/service_test.go
index 4456dc9..67dd0ba 100644
--- a/service_test.go
+++ b/service_test.go
@@ -1229,6 +1229,41 @@ func TestServiceResolveAllSynthesizesNSForDerivedZoneApex(t *testing.T) {
 	}
 }
 
+func TestServiceResolveAllReturnsEmptyArraysForMissingRecordValues(t *testing.T) {
+	service := NewService(ServiceOptions{
+		Records: map[string]NameRecords{
+			"gateway.charon.lthn": {
+				A: []string{"10.10.10.10"},
+			},
+			"node.charon.lthn": {
+				AAAA: []string{"2600:1f1c:7f0:4f01::2"},
+			},
+		},
+	})
+
+	result, ok := service.ResolveAll("gateway.charon.lthn")
+	if !ok {
+		t.Fatal("expected record to resolve")
+	}
+	if result.AAAA == nil || len(result.AAAA) != 0 {
+		t.Fatalf("expected empty AAAA slice, got %#v", result.AAAA)
+	}
+	if result.TXT == nil || len(result.TXT) != 0 {
+		t.Fatalf("expected empty TXT slice, got %#v", result.TXT)
+	}
+	if result.NS == nil || len(result.NS) != 0 {
+		t.Fatalf("expected empty NS slice, got %#v", result.NS)
+	}
+
+	raw, err := json.Marshal(result)
+	if err != nil {
+		t.Fatalf("expected result to marshal: %v", err)
+	}
+	if string(raw) != `{"a":["10.10.10.10"],"aaaa":[],"txt":[],"ns":[]}` {
+		t.Fatalf("expected empty arrays in JSON, got %s", raw)
+	}
+}
+
 func TestServiceServeReturnsNXDOMAINWhenMissing(t *testing.T) {
 	service := NewService(ServiceOptions{})