diff --git a/apps/GestureBuilder/Android.mk b/apps/GestureBuilder/Android.mk
index 79532df35..424844394 100644
--- a/apps/GestureBuilder/Android.mk
+++ b/apps/GestureBuilder/Android.mk
@@ -18,7 +18,7 @@ LOCAL_PATH:= $(call my-dir)
 include $(CLEAR_VARS)
 
 LOCAL_MODULE_TAGS := samples tests
-LOCAL_DEX_PREOPT := true
+
 LOCAL_SRC_FILES := $(call all-subdir-java-files)
 
 LOCAL_PACKAGE_NAME := GestureBuilder
diff --git a/apps/WidgetPreview/Android.mk b/apps/WidgetPreview/Android.mk
index f1a97964a..04a492798 100644
--- a/apps/WidgetPreview/Android.mk
+++ b/apps/WidgetPreview/Android.mk
@@ -18,7 +18,7 @@ LOCAL_PATH:= $(call my-dir)
 include $(CLEAR_VARS)
 
 LOCAL_MODULE_TAGS := samples
-LOCAL_DEX_PREOPT := true
+
 LOCAL_SRC_FILES := $(call all-subdir-java-files)
 
 LOCAL_PACKAGE_NAME := WidgetPreview
diff --git a/samples/ApiDemos/Android.mk b/samples/ApiDemos/Android.mk
index 782389694..fedf65a10 100644
--- a/samples/ApiDemos/Android.mk
+++ b/samples/ApiDemos/Android.mk
@@ -2,7 +2,7 @@ LOCAL_PATH:= $(call my-dir)
 include $(CLEAR_VARS)
 
 LOCAL_MODULE_TAGS := samples tests
-LOCAL_DEX_PREOPT := true
+
 # Only compile source java files in this apk.
 LOCAL_SRC_FILES := $(call all-java-files-under, src)
 LOCAL_SRC_FILES += \
diff --git a/samples/CubeLiveWallpaper/Android.mk b/samples/CubeLiveWallpaper/Android.mk
index 2b50673b4..d2bb1540b 100644
--- a/samples/CubeLiveWallpaper/Android.mk
+++ b/samples/CubeLiveWallpaper/Android.mk
@@ -18,7 +18,7 @@ LOCAL_PATH := $(call my-dir)
 include $(CLEAR_VARS)
 
 LOCAL_MODULE_TAGS := samples
-LOCAL_DEX_PREOPT := true
+
 LOCAL_SRC_FILES := $(call all-subdir-java-files)
 
 LOCAL_PACKAGE_NAME := CubeLiveWallpapers
diff --git a/samples/SoftKeyboard/Android.mk b/samples/SoftKeyboard/Android.mk
index 001db95a4..f727dcf21 100755
--- a/samples/SoftKeyboard/Android.mk
+++ b/samples/SoftKeyboard/Android.mk
@@ -2,7 +2,7 @@ LOCAL_PATH:= $(call my-dir)
 include $(CLEAR_VARS)
 
 LOCAL_MODULE_TAGS := samples
-LOCAL_DEX_PREOPT := true
+
 LOCAL_SRC_FILES := $(call all-subdir-java-files)
 
 LOCAL_SDK_VERSION := current