diff --git a/android/filegroup.go b/android/filegroup.go
index 0f6e00e..278d46d 100644
--- a/android/filegroup.go
+++ b/android/filegroup.go
@@ -26,13 +26,18 @@
 )
 
 func init() {
-	RegisterModuleType("filegroup", FileGroupFactory)
+	RegisterFilegroupBuildComponents(InitRegistrationContext)
 }
 
 var PrepareForTestWithFilegroup = FixtureRegisterWithContext(func(ctx RegistrationContext) {
-	ctx.RegisterModuleType("filegroup", FileGroupFactory)
+	RegisterFilegroupBuildComponents(ctx)
 })
 
+func RegisterFilegroupBuildComponents(ctx RegistrationContext) {
+	ctx.RegisterModuleType("filegroup", FileGroupFactory)
+	ctx.RegisterModuleType("filegroup_defaults", FileGroupDefaultsFactory)
+}
+
 var convertedProtoLibrarySuffix = "_bp2build_converted"
 
 // IsFilegroup checks that a module is a filegroup type
@@ -178,6 +183,7 @@
 type fileGroup struct {
 	ModuleBase
 	BazelModuleBase
+	DefaultableModuleBase
 	FileGroupAsLibrary
 	properties fileGroupProperties
 	srcs       Paths
@@ -195,6 +201,7 @@
 	module.AddProperties(&module.properties)
 	InitAndroidModule(module)
 	InitBazelModule(module)
+	InitDefaultableModule(module)
 	return module
 }
 
@@ -326,3 +333,17 @@
 	}
 	return nil, false
 }
+
+// Defaults
+type FileGroupDefaults struct {
+	ModuleBase
+	DefaultsModuleBase
+}
+
+func FileGroupDefaultsFactory() Module {
+	module := &FileGroupDefaults{}
+	module.AddProperties(&fileGroupProperties{})
+	InitDefaultsModule(module)
+
+	return module
+}