diff --git a/time4j-android/consumer-proguard-rules.pro b/time4j-android/consumer-proguard-rules.pro
index 4909740..1059646 100644
--- a/time4j-android/consumer-proguard-rules.pro
+++ b/time4j-android/consumer-proguard-rules.pro
@@ -1,6 +1,8 @@
 -useuniqueclassmembernames
 
--keep class net.time4j.android.spi.AndroidResourceLoader
+-keep class net.time4j.android.spi.AndroidResourceLoader {
+    public <init>();
+}
 
 -keepnames class net.time4j.tz.olson.AFRICA
 -keepnames class net.time4j.tz.olson.AMERICA
@@ -19,6 +21,8 @@
 -keep class net.time4j.SPX
 -keep class net.time4j.tz.SPX
 -keep class net.time4j.tz.model.SPX
+-keep public class net.time4j.android.ApplicationStarter
+-keep public class net.time4j.PrettyTime
 
 -keepnames class net.time4j.calendar.ChineseCalendar$SPX
 -keepnames class net.time4j.calendar.CopticCalendar$SPX