diff --git a/MVMCoreUI/Atomic/Atoms/FormFields/TextFields/MdnEntryField.swift b/MVMCoreUI/Atomic/Atoms/FormFields/TextFields/MdnEntryField.swift
index 837493e5..502682c2 100644
--- a/MVMCoreUI/Atomic/Atoms/FormFields/TextFields/MdnEntryField.swift
+++ b/MVMCoreUI/Atomic/Atoms/FormFields/TextFields/MdnEntryField.swift
@@ -219,6 +219,7 @@ import MVMCore
             if isNationalMDN {
                 textField.text = MVMCoreUIUtility.formatMdn(textField.text)
             }
+            // Validate the base input field along with triggering form field validation rules.
             validateText()
         }
     }