diff --git a/builtin/providers/azurerm/resource_arm_redis_cache.go b/builtin/providers/azurerm/resource_arm_redis_cache.go
index 112b4b8ea..9ff08a872 100644
--- a/builtin/providers/azurerm/resource_arm_redis_cache.go
+++ b/builtin/providers/azurerm/resource_arm_redis_cache.go
@@ -281,6 +281,8 @@ func resourceArmRedisCacheRead(d *schema.ResourceData, meta interface{}) error {
 	name := id.Path["Redis"]
 
 	resp, err := client.Get(resGroup, name)
+
+	// covers if the resource has been deleted outside of TF, but is still in the state
 	if resp.StatusCode == http.StatusNotFound {
 		d.SetId("")
 		return nil