diff --git a/gson/src/main/java/com/google/gson/Escaper.java b/gson/src/main/java/com/google/gson/Escaper.java
index b5eef01b..89c474d9 100644
--- a/gson/src/main/java/com/google/gson/Escaper.java
+++ b/gson/src/main/java/com/google/gson/Escaper.java
@@ -77,7 +77,7 @@ class Escaper {
        int codePoint = Character.codePointAt(plainText, i);
        charCount = Character.charCount(codePoint);
 
-         if (!((codePoint < 0x20 || codePoint >= 0x7f)
+         if (!(isControlCharacter(codePoint)
                || mustEscapeCharInJsString(codePoint))) {
             continue;
          }
@@ -103,6 +103,9 @@ class Escaper {
            case '\\':
              out.append("\\\\");
              break;
+           case '/':
+             out.append("\\/");
+             break;
            case '"':
              out.append('\\').append((char) codePoint);
              break;
@@ -117,6 +120,12 @@ class Escaper {
      out.append(plainText, pos, len);
   }
 
+  private static boolean isControlCharacter(int codePoint) {
+    return codePoint < 0x20 
+        || codePoint == 0x7f 
+        || (codePoint >= 0x80 && codePoint <= 0x9f);
+  }
+
   private static void appendHexJavaScriptRepresentation(int codePoint, Appendable out)
       throws IOException {
     if (Character.isSupplementaryCodePoint(codePoint)) {
diff --git a/gson/src/test/java/com/google/gson/functional/InternationalizationTest.java b/gson/src/test/java/com/google/gson/functional/InternationalizationTest.java
index c1d446c9..169c37a5 100644
--- a/gson/src/test/java/com/google/gson/functional/InternationalizationTest.java
+++ b/gson/src/test/java/com/google/gson/functional/InternationalizationTest.java
@@ -53,7 +53,7 @@ public class InternationalizationTest extends TestCase {
   public void testStringsWithUnicodeChineseCharactersSerialization() throws Exception {
     String target = "\u597d\u597d\u597d";
     String json = gson.toJson(target);
-    String expected = "\"\\u597d\\u597d\\u597d\"";
+    String expected = "\"\u597d\u597d\u597d\"";
     assertEquals(expected, json);
   }