diff --git a/postal_code.module b/postal_code.module
index af2b111..9b43660 100755
--- a/postal_code.module
+++ b/postal_code.module
@@ -283,7 +283,7 @@ function postal_code_validation() {
     'au' => array('/^(0[289][0-9]{2})|([1345689][0-9]{3})|(2[0-8][0-9]{2})|(290[0-9])|(291[0-4])|(7[0-4][0-9]{2})|(7[8-9][0-9]{2})$/'),
     'nl' => array('/^[1-9][0-9]{3}\s?([a-zA-Z]{2})?$/'),
     'es' => array('/^([1-9]{2}|[0-9][1-9]|[1-9][0-9])[0-9]{3}$/'),
-    'dk' => array('/^([D-d][K-k])?( |-)?[1-9]{1}[0-9]{3}$/'),
+    'dk' => array('/^([D-d][K-k])?( |-)?([0-9]{1})?[0-9]{3}$/'),
     'se' => array('/^(s-|S-){0,1}[0-9]{3}\s?[0-9]{2}$/'),
     'be' => array('/^[1-9]{1}[0-9]{3}$/'),
     'in' => array('/^([1-9][0-9]{2}\s?[0-9]{3})$/'),