diff --git a/filesystem/system_image.go b/filesystem/system_image.go
index 63cb627..57239ae 100644
--- a/filesystem/system_image.go
+++ b/filesystem/system_image.go
@@ -33,7 +33,7 @@
 // android_system_image is a specialization of android_filesystem for the 'system' partition.
 // Currently, the only difference is the inclusion of linker.config.pb file which specifies
 // the provided and the required libraries to and from APEXes.
-func systemImageFactory() android.Module {
+func SystemImageFactory() android.Module {
 	module := &systemImage{}
 	module.AddProperties(&module.properties)
 	module.filesystem.buildExtraFiles = module.buildExtraFiles
@@ -42,6 +42,10 @@
 	return module
 }
 
+func (s systemImage) FsProps() FilesystemProperties {
+	return s.filesystem.properties
+}
+
 func (s *systemImage) buildExtraFiles(ctx android.ModuleContext, root android.OutputPath) android.OutputPaths {
 	if s.filesystem.properties.Partition_type != nil {
 		ctx.PropertyErrorf("partition_type", "partition_type must be unset on an android_system_image module. It is assumed to be 'system'.")