diff --git a/chrome/content/zotero/xpcom/utilities.js b/chrome/content/zotero/xpcom/utilities.js
index 98791640cf..024d7c2255 100644
--- a/chrome/content/zotero/xpcom/utilities.js
+++ b/chrome/content/zotero/xpcom/utilities.js
@@ -61,7 +61,7 @@ const CSL_TEXT_MAPPINGS = {
 	"number-of-volumes":["numberOfVolumes"],
 	"number-of-pages":["numPages"],	
 	"edition":["edition"],
-	"version":["version", "session"],
+	"version":["version"],
 	"section":["section"],
 	"genre":["type"],
 	"source":["libraryCatalog"],
@@ -80,6 +80,7 @@ const CSL_TEXT_MAPPINGS = {
 	"call-number":["callNumber"],
 	"note":["extra"],
 	"number":["number"],
+	"chapter-number":["session"],
 	"references":["history"],
 	"shortTitle":["shortTitle"],
 	"journalAbbreviation":["journalAbbreviation"],