diff --git a/Android.mk b/Android.mk
index 1177ee9..252ba6f 100644
--- a/Android.mk
+++ b/Android.mk
@@ -20,6 +20,8 @@
 LOCAL_MODULE_TAGS := optional
 # and when built explicitly put it in the data partition
 LOCAL_MODULE_PATH := $(TARGET_OUT_DATA_APPS)
+# and because it is in data, do not strip classes.dex
+LOCAL_DEX_PREOPT := false
 
 LOCAL_SRC_FILES := $(call all-java-files-under, src)