diff --git a/config/vufind/searchspecs.yaml b/config/vufind/searchspecs.yaml
index c53f1ec7aeabcd3dfab14a694ad5f17b9654a536..5f5f86fbd414f4e029e2907d79390ebb4eb43e16 100644
--- a/config/vufind/searchspecs.yaml
+++ b/config/vufind/searchspecs.yaml
@@ -324,6 +324,8 @@ AllFields:
     - fulltext_unstemmed^10
     - allfields
     - fulltext
+    - isbn
+    - issn
   QueryFields:
     0:
       0:
@@ -376,6 +378,10 @@ AllFields:
       - [or, ~]
     fulltext:
       - [or, ~]
+    isbn:
+      - [onephrase, ~]
+    issn:
+      - [onephrase, ~]
 
 # These are advanced searches that never use Dismax:
 id: