diff --git a/java/src/json/ext/Generator.java b/java/src/json/ext/Generator.java
index 914d00e7..5cc00a39 100644
--- a/java/src/json/ext/Generator.java
+++ b/java/src/json/ext/Generator.java
@@ -334,6 +334,8 @@ void generate(final Session session, RubyHash object,
 
                 buffer.append((byte)'{');
                 buffer.append(objectNl);
+
+                final int[] count = new int[]{0};
                 object.visitAll(new RubyHash.Visitor() {
                     private boolean firstPair = true;
 
@@ -357,10 +359,11 @@ public void visit(IRubyObject key, IRubyObject value) {
                         Handler<IRubyObject> valueHandler = getHandlerFor(runtime, value);
                         valueHandler.generate(session, value, buffer);
                         session.infectBy(value);
+                        count[0]++;
                     }
                 });
                 state.decreaseDepth();
-                if (objectNl.length() != 0) {
+                if (count[0] > 0 && objectNl.length() != 0) {
                     buffer.append(objectNl);
                     buffer.append(Utils.repeat(state.getIndent(), state.getDepth()));
                 }