diff --git a/libs/binder/trusty/kernel/rules.mk b/libs/binder/trusty/kernel/rules.mk
index 788184d..5cbe0af 100644
--- a/libs/binder/trusty/kernel/rules.mk
+++ b/libs/binder/trusty/kernel/rules.mk
@@ -69,6 +69,7 @@
 	-DBINDER_DISABLE_NATIVE_HANDLE \
 	-DBINDER_DISABLE_BLOB \
 	-DBINDER_NO_LIBBASE \
+	-D__ANDROID_VENDOR__ \
 	-D__ANDROID_VNDK__ \
 
 MODULE_DEPS += \
diff --git a/libs/binder/trusty/rules.mk b/libs/binder/trusty/rules.mk
index e0f821f..f2f140d 100644
--- a/libs/binder/trusty/rules.mk
+++ b/libs/binder/trusty/rules.mk
@@ -72,6 +72,7 @@
 	-DBINDER_DISABLE_NATIVE_HANDLE \
 	-DBINDER_DISABLE_BLOB \
 	-DBINDER_NO_LIBBASE \
+	-D__ANDROID_VENDOR__ \
 	-D__ANDROID_VNDK__ \
 
 # libbinder has some deprecated declarations that we want to produce warnings