diff --git a/core/product.mk b/core/product.mk
index dbf49b5..7146b33 100644
--- a/core/product.mk
+++ b/core/product.mk
@@ -99,6 +99,10 @@
     PRODUCT_RUNTIMES \
     PRODUCT_BOOT_JARS \
     PRODUCT_DEX_PREOPT_IMAGE_IN_DATA \
+    PRODUCT_DEX_PREOPT_MODULE_CONFIGS \
+    PRODUCT_DEX_PREOPT_DEFAULT_FLAGS \
+    PRODUCT_DEX_PREOPT_BOOT_FLAGS \
+
 
 define dump-product
 $(info ==== $(1) ====)\
@@ -287,3 +291,14 @@
 define add-to-product-copy-files-if-exists
 $(if $(wildcard $(word 1,$(subst :, ,$(1)))),$(1))
 endef
+
+# whitespace placeholder when we record module's dex-preopt config.
+_PDPMC_SP_PLACE_HOLDER := |@SP@|
+# Set up dex-preopt config for a module.
+# $(1) list of module names
+# $(2) the modules' dex-preopt config
+define add-product-dex-preopt-module-config
+$(eval _c := $(subst $(space),$(_PDPMC_SP_PLACE_HOLDER),$(strip $(2))))\
+$(eval PRODUCT_DEX_PREOPT_MODULE_CONFIGS += \
+  $(foreach m,$(1),$(m)=$(_c)))
+endef