diff --git a/JsonGenerator/JsonValue.h b/JsonGenerator/JsonValue.h
index d93dc004..ea7fa898 100644
--- a/JsonGenerator/JsonValue.h
+++ b/JsonGenerator/JsonValue.h
@@ -69,6 +69,11 @@ namespace ArduinoJson
                 return content.asLong;
             }
 
+            operator long()
+            {
+                return content.asLong;
+            }
+
             size_t printTo(Print& p) const
             {
                 // handmade polymorphism
diff --git a/JsonGeneratorTests/JsonValue_Cast_Tests.cpp b/JsonGeneratorTests/JsonValue_Cast_Tests.cpp
index 26108a75..72b5dcf1 100644
--- a/JsonGeneratorTests/JsonValue_Cast_Tests.cpp
+++ b/JsonGeneratorTests/JsonValue_Cast_Tests.cpp
@@ -29,6 +29,10 @@ namespace JsonGeneratorTests
             setValueAndCheckCast(42);
         }
 
+        TEST_METHOD(Long)
+        {
+            setValueAndCheckCast(42L);
+        }
 
     private: