diff --git a/Android.mk b/Android.mk
index 5c671f9..7ccddea 100644
--- a/Android.mk
+++ b/Android.mk
@@ -39,12 +39,25 @@
 $(generated_sources_dir)/libsyscalls.c: PRIVATE_CUSTOM_TOOL = $< "$(lastword $(CLANG)) -isystem bionic/libc/kernel/uapi/asm-$(TARGET_ARCH)" $@
 $(generated_sources_dir)/libsyscalls.c: $(LOCAL_PATH)/gen_syscalls.sh
 	$(transform-generated-source)
-LOCAL_GENERATED_SOURCES += $(generated_sources_dir)/libsyscalls.c
+LOCAL_GENERATED_SOURCES_$(TARGET_ARCH) += $(generated_sources_dir)/libsyscalls.c
 
 $(generated_sources_dir)/libconstants.c: PRIVATE_CUSTOM_TOOL = $< "$(lastword $(CLANG)) -isystem bionic/libc/kernel/uapi/asm-$(TARGET_ARCH)" $@
 $(generated_sources_dir)/libconstants.c: $(LOCAL_PATH)/gen_constants.sh
 	$(transform-generated-source)
-LOCAL_GENERATED_SOURCES += $(generated_sources_dir)/libconstants.c
+LOCAL_GENERATED_SOURCES_$(TARGET_ARCH) += $(generated_sources_dir)/libconstants.c
+
+# For processes running in 32-bit compat mode on 64-bit processors.
+ifdef TARGET_2ND_ARCH
+$(generated_sources_dir)/libsyscalls.c: PRIVATE_CUSTOM_TOOL = $< "$(lastword $(CLANG)) -isystem bionic/libc/kernel/uapi/asm-$(TARGET_2ND_ARCH)" $@
+$(generated_sources_dir)/libsyscalls.c: $(LOCAL_PATH)/gen_syscalls.sh
+	$(transform-generated-source)
+LOCAL_GENERATED_SOURCES_$(TARGET_2ND_ARCH) += $(generated_sources_dir)/libsyscalls.c
+
+$(generated_sources_dir)/libconstants.c: PRIVATE_CUSTOM_TOOL = $< "$(lastword $(CLANG)) -isystem bionic/libc/kernel/uapi/asm-$(TARGET_2ND_ARCH)" $@
+$(generated_sources_dir)/libconstants.c: $(LOCAL_PATH)/gen_constants.sh
+	$(transform-generated-source)
+LOCAL_GENERATED_SOURCES_$(TARGET_2ND_ARCH) += $(generated_sources_dir)/libconstants.c
+endif
 
 LOCAL_CFLAGS := $(minijailCommonCFlags)
 LOCAL_CLANG := true