diff --git a/android/package_ctx.go b/android/package_ctx.go
index 1626f76..b40e0a9 100644
--- a/android/package_ctx.go
+++ b/android/package_ctx.go
@@ -47,7 +47,7 @@
 var _ PathContext = &configErrorWrapper{}
 var _ errorfContext = &configErrorWrapper{}
 
-func (e *configErrorWrapper) Config() interface{} {
+func (e *configErrorWrapper) Config() Config {
 	return e.config
 }
 func (e *configErrorWrapper) Errorf(format string, args ...interface{}) {