diff --git a/constants/null_doi.php b/constants/null_doi.php
index 3a3521d134..6323b38e50 100644
--- a/constants/null_doi.php
+++ b/constants/null_doi.php
@@ -130,6 +130,7 @@
 '10.7313/upo9781904761679.011',
 '10.7556/jaoa',
 '10.7575/aiac.ijalel.v.6n.3p.71',
+'10.1093/phr/115.1.12',
 );
 
 const NULL_DOI_BUT_GOOD = array(  // TODO - these need to be manually double checked once in a great while.  Note that a failed url on one computer does not mean it is gone, it might just be you