diff --git a/cmds/servicemanager/Android.mk b/cmds/servicemanager/Android.mk
index 138be5232..12149f621 100644
--- a/cmds/servicemanager/Android.mk
+++ b/cmds/servicemanager/Android.mk
@@ -3,6 +3,10 @@ LOCAL_PATH:= $(call my-dir)
 svc_c_flags =	\
 	-Wall -Wextra \
 
+ifneq ($(TARGET_USES_64_BIT_BINDER),true)
+svc_c_flags += -DBINDER_IPC_32BIT=1
+endif
+
 include $(CLEAR_VARS)
 LOCAL_SHARED_LIBRARIES := liblog
 LOCAL_SRC_FILES := bctest.c binder.c
diff --git a/libs/binder/Android.mk b/libs/binder/Android.mk
index f3f8dafc2..3c6b8ad90 100644
--- a/libs/binder/Android.mk
+++ b/libs/binder/Android.mk
@@ -42,6 +42,9 @@ LOCAL_LDLIBS += -lpthread
 LOCAL_MODULE := libbinder
 LOCAL_SHARED_LIBRARIES := liblog libcutils libutils
 LOCAL_SRC_FILES := $(sources)
+ifneq ($(TARGET_USES_64_BIT_BINDER),true)
+LOCAL_CFLAGS += -DBINDER_IPC_32BIT=1
+endif
 include $(BUILD_SHARED_LIBRARY)
 
 include $(CLEAR_VARS)
@@ -49,4 +52,7 @@ LOCAL_LDLIBS += -lpthread
 LOCAL_MODULE := libbinder
 LOCAL_STATIC_LIBRARIES += libutils
 LOCAL_SRC_FILES := $(sources)
+ifneq ($(TARGET_USES_64_BIT_BINDER),true)
+LOCAL_CFLAGS += -DBINDER_IPC_32BIT=1
+endif
 include $(BUILD_STATIC_LIBRARY)