diff --git a/rust/rust.go b/rust/rust.go
index 14513fb..e2af6f0 100644
--- a/rust/rust.go
+++ b/rust/rust.go
@@ -85,6 +85,10 @@
 	return true
 }
 
+func (mod *Module) RamdiskVariantNeeded(android.BaseModuleContext) bool {
+	return mod.InRamdisk()
+}
+
 func (mod *Module) RecoveryVariantNeeded(android.BaseModuleContext) bool {
 	return mod.InRecovery()
 }
@@ -152,6 +156,10 @@
 	panic(fmt.Errorf("Toc() called on non-library module: %q", mod.BaseModuleName()))
 }
 
+func (mod *Module) OnlyInRamdisk() bool {
+	return false
+}
+
 func (mod *Module) OnlyInRecovery() bool {
 	return false
 }