diff --git a/core/combo/TARGET_linux-aarch64.mk b/core/combo/TARGET_linux-aarch64.mk
index 49cf9c029..bdb30176d 100644
--- a/core/combo/TARGET_linux-aarch64.mk
+++ b/core/combo/TARGET_linux-aarch64.mk
@@ -40,6 +40,8 @@ else
 TARGET_GCC_VERSION := $(TARGET_GCC_VERSION_EXP)
 endif
 
+TARGET_IS_64_BIT := true
+
 TARGET_ARCH_SPECIFIC_MAKEFILE := $(BUILD_COMBOS)/arch/$(TARGET_ARCH)/$(TARGET_ARCH_VARIANT).mk
 ifeq ($(strip $(wildcard $(TARGET_ARCH_SPECIFIC_MAKEFILE))),)
 $(error Unknown ARM architecture version: $(TARGET_ARCH_VARIANT))
diff --git a/core/combo/TARGET_linux-x86_64.mk b/core/combo/TARGET_linux-x86_64.mk
index 9bb5724d0..1ad48c8bf 100755
--- a/core/combo/TARGET_linux-x86_64.mk
+++ b/core/combo/TARGET_linux-x86_64.mk
@@ -28,6 +28,8 @@ else
 TARGET_GCC_VERSION := $(TARGET_GCC_VERSION_EXP)
 endif
 
+TARGET_IS_64_BIT := true
+
 # Include the arch-variant-specific configuration file.
 # Its role is to define various ARCH_X86_HAVE_XXX feature macros,
 # plus initial values for TARGET_GLOBAL_CFLAGS