diff --git a/helper/schema/field_writer_map.go b/helper/schema/field_writer_map.go
index 814c7ba8e3fc..08ee11c37121 100644
--- a/helper/schema/field_writer_map.go
+++ b/helper/schema/field_writer_map.go
@@ -297,13 +297,14 @@ func (w *MapFieldWriter) setSet(
 	// we get the proper order back based on the hash code.
 	if v := reflect.ValueOf(value); v.Kind() == reflect.Slice {
 		// Build a temp *ResourceData to use for the conversion
+		tempAddr := addr[len(addr)-1:]
 		tempSchema := *schema
 		tempSchema.Type = TypeList
-		tempSchemaMap := map[string]*Schema{addr[0]: &tempSchema}
+		tempSchemaMap := map[string]*Schema{tempAddr[0]: &tempSchema}
 		tempW := &MapFieldWriter{Schema: tempSchemaMap}
 
 		// Set the entire list, this lets us get sane values out of it
-		if err := tempW.WriteField(addr, value); err != nil {
+		if err := tempW.WriteField(tempAddr, value); err != nil {
 			return err
 		}
 
@@ -319,7 +320,7 @@ func (w *MapFieldWriter) setSet(
 		}
 		for i := 0; i < v.Len(); i++ {
 			is := strconv.FormatInt(int64(i), 10)
-			result, err := tempR.ReadField(append(addrCopy, is))
+			result, err := tempR.ReadField(append(tempAddr, is))
 			if err != nil {
 				return err
 			}
diff --git a/helper/schema/resource_data_test.go b/helper/schema/resource_data_test.go
index 6ef19017d2cc..29d665746cd9 100644
--- a/helper/schema/resource_data_test.go
+++ b/helper/schema/resource_data_test.go
@@ -2059,6 +2059,69 @@ func TestResourceDataSet(t *testing.T) {
 			GetKey:   "availability_zone",
 			GetValue: "",
 		},
+
+		// #16: Set in a list
+		{
+			Schema: map[string]*Schema{
+				"ports": &Schema{
+					Type: TypeList,
+					Elem: &Resource{
+						Schema: map[string]*Schema{
+							"set": &Schema{
+								Type: TypeSet,
+								Elem: &Schema{Type: TypeInt},
+								Set: func(a interface{}) int {
+									return a.(int)
+								},
+							},
+						},
+					},
+				},
+			},
+
+			State: nil,
+
+			Key: "ports",
+			Value: []interface{}{
+				map[string]interface{}{
+					"set": []interface{}{
+						1,
+					},
+				},
+			},
+
+			GetKey: "ports",
+			GetValue: []interface{}{
+				map[string]interface{}{
+					"set": []interface{}{
+						1,
+					},
+				},
+			},
+			GetPreProcess: func(v interface{}) interface{} {
+				if v == nil {
+					return v
+				}
+				s, ok := v.([]interface{})
+				if !ok {
+					return v
+				}
+				for _, v := range s {
+					m, ok := v.(map[string]interface{})
+					if !ok {
+						continue
+					}
+					if m["set"] == nil {
+						continue
+					}
+					if s, ok := m["set"].(*Set); ok {
+						m["set"] = s.List()
+					}
+				}
+
+				return v
+			},
+		},
 	}
 
 	oldEnv := os.Getenv(PanicOnErr)