diff --git a/libc/include/sys/_system_properties.h b/libc/include/sys/_system_properties.h
index 10c0fae16..5d2043d24 100644
--- a/libc/include/sys/_system_properties.h
+++ b/libc/include/sys/_system_properties.h
@@ -104,6 +104,7 @@ struct prop_msg
 #define PROP_PATH_SYSTEM_BUILD     "/system/build.prop"
 #define PROP_PATH_SYSTEM_DEFAULT   "/system/default.prop"
 #define PROP_PATH_LOCAL_OVERRIDE   "/data/local.prop"
+#define PROP_PATH_FACTORY          "/factory/factory.prop"
 
 #endif
 #endif