diff --git a/website/docs/r/sql_database_instance.html.markdown b/website/docs/r/sql_database_instance.html.markdown
index 4ecfac70..e1f3df06 100644
--- a/website/docs/r/sql_database_instance.html.markdown
+++ b/website/docs/r/sql_database_instance.html.markdown
@@ -320,4 +320,9 @@ $ terraform import google_sql_database_instance.master projects/{{project}}/inst
 $ terraform import google_sql_database_instance.master {{project}}/{{name}}
 $ terraform import google_sql_database_instance.master {{name}}
 
-```
\ No newline at end of file
+```
+
+~> **NOTE:** Some fields (such as `replica_configuration`) won't show a diff if they are unset in
+config and set on the server.
+When importing, double-check that your config has all the fields set that you expect- just seeing
+no diff isn't sufficient to know that your config could reproduce the imported resource.