diff --git a/proguard.cfg b/proguard.cfg
index 4dc32b102..cc8620f3d 100644
--- a/proguard.cfg
+++ b/proguard.cfg
@@ -14,6 +14,11 @@
 -keep public class * extends android.preference.Preference
 -keep public class com.android.vending.licensing.ILicensingService
 
+# Allow obfuscation of android.support.v7.internal.view.menu.**
+# to avoid problem on Samsung 4.2.2 devices with appcompat v21
+# see https://code.google.com/p/android/issues/detail?id=78377
+-keep class !android.support.v7.internal.view.menu.**,android.support.** {*;}
+
 -keepclasseswithmembers class * {
     native <methods>;
 }