diff --git a/res/values/strings.xml b/res/values/strings.xml
index a7fdc02..81673ed 100644
--- a/res/values/strings.xml
+++ b/res/values/strings.xml
@@ -359,7 +359,7 @@
 <string name="p_retry_interval_summary">Rate doubles each retry</string>
 
 <string name="p_ackdupe_interval">Ack Dupe Timeout</string>
-<string name="p_ackdupe_interval_entry">Ack dupe timeout in seconds</string>
+<string name="p_ackdupe_interval_entry">Ack dupe timeout (0 = ack disabled)</string>
 <string name="p_ackdupe_interval_summary">Dupe timeout</string>
 
 <string name="p_ackdupetoggle">Ack Dupe Timeout</string>
diff --git a/res/xml/digi.xml b/res/xml/digi.xml
index 0fa9e24..473a6e3 100644
--- a/res/xml/digi.xml
+++ b/res/xml/digi.xml
@@ -23,6 +23,7 @@
 	<de.duenndns.EditTextPreferenceWithValue
 		android:key="p.dedupe"
 		android:defaultValue="30"
+		android:hint="30"
 		android:inputType="number"
 		android:title="@string/p_dedupe"
 		android:summary="@string/p_dedupe_summary"
diff --git a/res/xml/messaging.xml b/res/xml/messaging.xml
index b40bacb..942ebda 100644
--- a/res/xml/messaging.xml
+++ b/res/xml/messaging.xml
@@ -13,6 +13,7 @@
 	<de.duenndns.EditTextPreferenceWithValue
 		android:key="p.retry"
 		android:defaultValue="30"
+		android:hint="30"
 		android:inputType="number"
 		android:title="@string/p_retry_interval"
 		android:summary="@string/p_retry_interval_summary"
@@ -26,7 +27,8 @@
 
 	<de.duenndns.EditTextPreferenceWithValue
 		android:key="p.ackdupe"
-		android:defaultValue="0"
+		android:defaultValue="30"
+		android:hint="30"		
 		android:inputType="number"
 		android:title="@string/p_ackdupe_interval"
 		android:summary="@string/p_ackdupe_interval_summary"