diff --git a/src/com/hippo/ehviewer/widget/TextClock.java b/src/com/hippo/ehviewer/widget/TextClock.java
index 921ac99ca..42b41f236 100644
--- a/src/com/hippo/ehviewer/widget/TextClock.java
+++ b/src/com/hippo/ehviewer/widget/TextClock.java
@@ -26,6 +26,7 @@ import android.content.Intent;
 import android.content.IntentFilter;
 import android.database.ContentObserver;
 import android.net.Uri;
+import android.os.Build;
 import android.os.Handler;
 import android.os.SystemClock;
 import android.provider.Settings;
@@ -39,7 +40,14 @@ import com.hippo.ehviewer.util.DateUtils;
 public class TextClock extends TextView {
 
     public static final CharSequence DEFAULT_FORMAT_12_HOUR = "hh:mm a";
-    public static final CharSequence DEFAULT_FORMAT_24_HOUR = "HH:mm";
+    public static final CharSequence DEFAULT_FORMAT_24_HOUR;
+
+    static {
+        if (Build.VERSION.SDK_INT < Build.VERSION_CODES.JELLY_BEAN_MR2)
+            DEFAULT_FORMAT_24_HOUR = "kk:mm";
+        else
+            DEFAULT_FORMAT_24_HOUR = "HH:mm";
+    }
 
     private CharSequence mFormat12;
     private CharSequence mFormat24;