diff --git a/isnad-metinici.csl b/isnad-metinici.csl
index f8c478ffd93..b622aea27c4 100644
--- a/isnad-metinici.csl
+++ b/isnad-metinici.csl
@@ -269,7 +269,7 @@
           </if>
         </choose>
       </if>
-      <else-if type="book graphic manuscript report map personal_communication" match="any">
+      <else-if type="book thesis graphic manuscript report map personal_communication" match="any">
         <text variable="title" text-case="title" font-style="italic"/>
         <text variable="version" prefix=" "/>
       </else-if>