diff --git a/loadTerms.py b/loadTerms.py
index e88403e..be31eef 100755
--- a/loadTerms.py
+++ b/loadTerms.py
@@ -768,6 +768,11 @@ def addAccID(self,
             else:
                 xrefs = prefixPart.split(':')
                 findLDB = xrefs[0]
+                if findLDB == 'OMIMPS':
+                    # Prepare for DOID to apply proper prefixes for OMIM Phenotype series terms
+                    # See: https://github.com/DiseaseOntology/HumanDiseaseOntology/pull/968
+                    findLDB = 'OMIM:PS'
+
             results = db.sql('''select _LogicalDB_key from ACC_LogicalDB where name = '%s' ''' % (findLDB), 'auto')
             if len(results) > 0:
                 useLogicalDBkey = results[0]['_LogicalDB_key']