diff --git a/org.fox.ttrss/src/main/res/values/strings.xml b/org.fox.ttrss/src/main/res/values/strings.xml
index a607c720..15c3b567 100755
--- a/org.fox.ttrss/src/main/res/values/strings.xml
+++ b/org.fox.ttrss/src/main/res/values/strings.xml
@@ -253,4 +253,5 @@
     <string name="widget_background_dark">Dark</string>
     <string name="widget_background_transparent">Transparent</string>
     <string name="pref_widget_background">Background color</string>
+    <string name="pref_widget_update_interval_summary">This interval is imprecise due to Android limitations</string>
 </resources>
diff --git a/org.fox.ttrss/src/main/res/xml/preferences.xml b/org.fox.ttrss/src/main/res/xml/preferences.xml
index c3114eb1..c3c094a2 100755
--- a/org.fox.ttrss/src/main/res/xml/preferences.xml
+++ b/org.fox.ttrss/src/main/res/xml/preferences.xml
@@ -194,6 +194,7 @@
             android:entries="@array/pref_widget_update_intervals"
             android:entryValues="@array/pref_widget_update_intervals"
             android:key="widget_update_interval"
+            android:summary="@string/pref_widget_update_interval_summary"
             android:title="@string/pref_widget_update_interval" />
 
         <ListPreference