diff --git a/src/main/java/org/datadog/jmxfetch/Status.java b/src/main/java/org/datadog/jmxfetch/Status.java
index 178393217..97e8aa2d0 100644
--- a/src/main/java/org/datadog/jmxfetch/Status.java
+++ b/src/main/java/org/datadog/jmxfetch/Status.java
@@ -126,7 +126,7 @@ private String generateJson() throws IOException {
         Map<String, Object> status = new HashMap<String, Object>();
         status.put("timestamp", System.currentTimeMillis());
         status.put("checks", this.instanceStats);
-        return JSON.std.asString(status);
+        return JSON.std.with(JSON.Feature.WRITE_NULL_PROPERTIES).asString(status);
     }
 
     /** Flushes current status. */
diff --git a/src/main/java/org/datadog/jmxfetch/reporter/JsonReporter.java b/src/main/java/org/datadog/jmxfetch/reporter/JsonReporter.java
index 1bad178e4..123016b6f 100644
--- a/src/main/java/org/datadog/jmxfetch/reporter/JsonReporter.java
+++ b/src/main/java/org/datadog/jmxfetch/reporter/JsonReporter.java
@@ -47,7 +47,7 @@ public void doSendServiceCheck(
         sc.put("status", this.statusToServiceCheckStatusValue(status));
         sc.put("message", message);
         sc.put("tags", tags);
-      
+
         Map<String, Object> aggregator = new HashMap<String, Object>();
         aggregator.put("metrics", metrics);
         List<Object> serviceChecks = new ArrayList<Object>();
@@ -60,7 +60,12 @@ public void doSendServiceCheck(
 
         System.out.println("=== JSON ===");
         try {
-            System.out.println(JSON.std.with(JSON.Feature.PRETTY_PRINT_OUTPUT).asString(series));
+            System.out.println(
+                JSON.std.with(
+                    JSON.Feature.PRETTY_PRINT_OUTPUT,
+                    JSON.Feature.WRITE_NULL_PROPERTIES
+                ).asString(series)
+            );
         } catch (IOException e) {
             log.error("Couln't produce JSON output");
         }