diff --git a/core/dex_preopt_odex_install.mk b/core/dex_preopt_odex_install.mk
index 5528eda..d56c68a 100644
--- a/core/dex_preopt_odex_install.mk
+++ b/core/dex_preopt_odex_install.mk
@@ -121,8 +121,10 @@
 ifdef LOCAL_VENDOR_MODULE
 $(call pretty-error, Internal error: profiles are not supported for vendor modules)
 else
+ifeq (,$(LOCAL_DEX_PREOPT_APP_IMAGE))
 LOCAL_DEX_PREOPT_APP_IMAGE := true
 endif
+endif
 
 ifndef LOCAL_DEX_PREOPT_PROFILE
 $(call pretty-error,Must have specified class listing (LOCAL_DEX_PREOPT_PROFILE))