diff --git a/addon/src/main/java/com/vaadin/addon/charts/model/ChartType.java b/addon/src/main/java/com/vaadin/addon/charts/model/ChartType.java
index 405dc7fe0..2c691e3d7 100644
--- a/addon/src/main/java/com/vaadin/addon/charts/model/ChartType.java
+++ b/addon/src/main/java/com/vaadin/addon/charts/model/ChartType.java
@@ -156,4 +156,19 @@ protected ChartType(String type) {
     public String toString() {
         return type;
     }
+
+    @Override
+    public boolean equals(Object o) {
+        if (this == o) return true;
+        if (!(o instanceof ChartType)) return false;
+
+        ChartType chartType = (ChartType) o;
+
+        return type != null ? type.equals(chartType.type) : chartType.type == null;
+    }
+
+    @Override
+    public int hashCode() {
+        return type != null ? type.hashCode() : 0;
+    }
 }