diff --git a/src/jquery.date-dropdowns.js b/src/jquery.date-dropdowns.js
index 0009c2a..149a658 100644
--- a/src/jquery.date-dropdowns.js
+++ b/src/jquery.date-dropdowns.js
@@ -464,7 +464,7 @@
                     suffix = (number % 100 === 13) ? th : rd;
                     break;
                 default:
-                    suffix = 'th';
+                    suffix = th;
                     break;
             }