diff --git a/res/xml/about_settings.xml b/res/xml/about_settings.xml
index f36a2c74f..7d8d82c8b 100644
--- a/res/xml/about_settings.xml
+++ b/res/xml/about_settings.xml
@@ -64,7 +64,6 @@
             android:entryValues="@array/update_server_entry_values"
             android:key="update_server"
             android:title="@string/update_server_title"
-            android:summary="%s"
             android:defaultValue="1" />
 
         <Preference
diff --git a/res/xml/display_settings.xml b/res/xml/display_settings.xml
index b141fb092..77bda014c 100644
--- a/res/xml/display_settings.xml
+++ b/res/xml/display_settings.xml
@@ -41,8 +41,7 @@
             android:title="@string/screen_orientation_title"
             android:entries="@array/screen_orientation_entries"
             android:entryValues="@array/screen_orientation_entry_values"
-            android:defaultValue="0"
-            android:summary="%s" />
+            android:defaultValue="0" />
 
     </PreferenceCategory>
 
@@ -54,8 +53,7 @@
             android:title="@string/list_mode_title"
             android:entries="@array/list_mode_entries"
             android:entryValues="@array/list_mode_entry_values"
-            android:defaultValue="0"
-            android:summary="%s" />
+            android:defaultValue="0" />
 
         <com.hippo.ehviewer.preference.NumberOfColumnsPreference
             xmlns:auto="http://schemas.android.com/apk/res-auto"
diff --git a/res/xml/eh_settings.xml b/res/xml/eh_settings.xml
index b575242b3..e4abedd7d 100644
--- a/res/xml/eh_settings.xml
+++ b/res/xml/eh_settings.xml
@@ -50,7 +50,6 @@
             android:entries="@array/preview_mode_entries"
             android:entryValues="@array/preview_mode_entry_values"
             android:key="preview_mode"
-            android:summary="%s"
             android:title="@string/preview_mode_title" />
 
     </PreferenceCategory>
@@ -61,8 +60,7 @@
             android:key="default_favorite"
             android:title="@string/default_favorite"
             android:entryValues="@array/default_favorite_entry_values"
-            android:defaultValue="-2"
-            android:summary="%s" />
+            android:defaultValue="-2" />
 
     </PreferenceCategory>
 
diff --git a/src/com/hippo/ehviewer/preference/ListPreference.java b/src/com/hippo/ehviewer/preference/ListPreference.java
index 1871ef6c2..4f5b41c8f 100644
--- a/src/com/hippo/ehviewer/preference/ListPreference.java
+++ b/src/com/hippo/ehviewer/preference/ListPreference.java
@@ -102,8 +102,10 @@ public class ListPreference extends DialogPreference {
     @Override
     public CharSequence getSummary() {
         final CharSequence entry = getEntry();
-        if (mSummary == null || entry == null) {
+        if (entry == null) {
             return super.getSummary();
+        } else if (mSummary == null) {
+            return entry;
         } else {
             return String.format(mSummary, entry);
         }