diff --git a/terraform/resource_mode.go b/terraform/resource_mode.go
index 7b2f372aa..70d441df6 100644
--- a/terraform/resource_mode.go
+++ b/terraform/resource_mode.go
@@ -1,6 +1,9 @@
 package terraform
 
 //go:generate stringer -type=ResourceMode -output=resource_mode_string.go resource_mode.go
+
+// ResourceMode is deprecated, use addrs.ResourceMode instead.
+// It has been preserved for backwards compatibility.
 type ResourceMode int
 
 const (