diff --git a/src/main/java/org/json/simple/JSONValue.java b/src/main/java/org/json/simple/JSONValue.java
index 2fddb217..bd05e307 100644
--- a/src/main/java/org/json/simple/JSONValue.java
+++ b/src/main/java/org/json/simple/JSONValue.java
@@ -221,7 +221,9 @@ public static void writeJSONString(Object value, Writer out) throws IOException
 			return;
 		}
 		
-		out.write(value.toString());
+        out.write('\"');
+        out.write(escape(value.toString()));
+        out.write('\"');
 	}
 
 	/**