diff --git a/text_helpers.go b/text_helpers.go
index 262695b..9b62365 100644
--- a/text_helpers.go
+++ b/text_helpers.go
@@ -184,6 +184,8 @@ func mkFunctionName(fkeyTableSingular, foreignTablePluralGo, fkeyColumn string,
 	return strmangle.TitleCase(colName) + foreignTablePluralGo
 }
 
+// PreserveDot allows us to pass in templateData to relationship templates
+// called with the template function.
 type PreserveDot struct {
 	Dot templateData
 	Rel RelationshipToOneTexts