diff --git a/core/config.mk b/core/config.mk
index 1db3d7a..5bfca17 100644
--- a/core/config.mk
+++ b/core/config.mk
@@ -645,21 +645,14 @@
 endif
 
 # Flags for DEX2OAT
+first_non_empty_of_three = $(if $(1),$(1),$(if $(2),$(2),$(3)))
 DEX2OAT_TARGET_ARCH := $(TARGET_ARCH)
-ifeq ($(TARGET_CPU_VARIANT),)
-ifeq ($(TARGET_ARCH_VARIANT),)
-DEX2OAT_TARGET_CPU_VARIANT := default
-else
-DEX2OAT_TARGET_CPU_VARIANT := $(TARGET_ARCH_VARIANT)
-endif
-else
-DEX2OAT_TARGET_CPU_VARIANT := $(TARGET_CPU_VARIANT)
-endif
+DEX2OAT_TARGET_CPU_VARIANT := $(call first_non_empty_of_three,$(TARGET_CPU_VARIANT),$(TARGET_ARCH_VARIANT),default)
 DEX2OAT_TARGET_INSTRUCTION_SET_FEATURES := default
 
 ifdef TARGET_2ND_ARCH
 $(TARGET_2ND_ARCH_VAR_PREFIX)DEX2OAT_TARGET_ARCH := $(TARGET_2ND_ARCH)
-$(TARGET_2ND_ARCH_VAR_PREFIX)DEX2OAT_TARGET_CPU_VARIANT := $(TARGET_2ND_CPU_VARIANT)
+$(TARGET_2ND_ARCH_VAR_PREFIX)DEX2OAT_TARGET_CPU_VARIANT := $(call first_non_empty_of_three,$(TARGET_2ND_CPU_VARIANT),$(TARGET_2ND_ARCH_VARIANT),default)
 $(TARGET_2ND_ARCH_VAR_PREFIX)DEX2OAT_TARGET_INSTRUCTION_SET_FEATURES := default
 endif