diff --git a/android/proguard.cfg b/android/proguard.cfg
index 3dc25f17f..01cceefa4 100644
--- a/android/proguard.cfg
+++ b/android/proguard.cfg
@@ -10,7 +10,7 @@
 # be complete or up to date. (The "arithmetic" optimization can be
 # used if you are only targeting Android 2.0 or later.)  Make sure you
 # test thoroughly if you go this route.
--optimizations !code/simplification/cast,!field/*,!class/merging/*,!code/allocation/variable,!method/marking/private
+-optimizations !code/simplification/cast,!field/*,!class/merging/*,!class/unboxing/enum,!code/allocation/variable,!method/marking/private
 -optimizationpasses 5
 -allowaccessmodification
 -dontpreverify
diff --git a/androidtest/proguard.cfg b/androidtest/proguard.cfg
index 3dc25f17f..01cceefa4 100644
--- a/androidtest/proguard.cfg
+++ b/androidtest/proguard.cfg
@@ -10,7 +10,7 @@
 # be complete or up to date. (The "arithmetic" optimization can be
 # used if you are only targeting Android 2.0 or later.)  Make sure you
 # test thoroughly if you go this route.
--optimizations !code/simplification/cast,!field/*,!class/merging/*,!code/allocation/variable,!method/marking/private
+-optimizations !code/simplification/cast,!field/*,!class/merging/*,!class/unboxing/enum,!code/allocation/variable,!method/marking/private
 -optimizationpasses 5
 -allowaccessmodification
 -dontpreverify
diff --git a/glass/proguard.cfg b/glass/proguard.cfg
index 3dc25f17f..01cceefa4 100644
--- a/glass/proguard.cfg
+++ b/glass/proguard.cfg
@@ -10,7 +10,7 @@
 # be complete or up to date. (The "arithmetic" optimization can be
 # used if you are only targeting Android 2.0 or later.)  Make sure you
 # test thoroughly if you go this route.
--optimizations !code/simplification/cast,!field/*,!class/merging/*,!code/allocation/variable,!method/marking/private
+-optimizations !code/simplification/cast,!field/*,!class/merging/*,!class/unboxing/enum,!code/allocation/variable,!method/marking/private
 -optimizationpasses 5
 -allowaccessmodification
 -dontpreverify