diff --git a/chrome/content/zotero/xpcom/utilities.js b/chrome/content/zotero/xpcom/utilities.js
index 75e879ec0f..318bd78b1e 100644
--- a/chrome/content/zotero/xpcom/utilities.js
+++ b/chrome/content/zotero/xpcom/utilities.js
@@ -960,6 +960,7 @@ Zotero.Utilities = {
 			{'base':'NJ','letters':/[\u01CA]/g},
 			{'base':'Nj','letters':/[\u01CB]/g},
 			{'base':'O', 'letters':/[\u004F\u24C4\uFF2F\u00D2\u00D3\u00D4\u1ED2\u1ED0\u1ED6\u1ED4\u00D5\u1E4C\u022C\u1E4E\u014C\u1E50\u1E52\u014E\u022E\u0230\u00D6\u022A\u1ECE\u0150\u01D1\u020C\u020E\u01A0\u1EDC\u1EDA\u1EE0\u1EDE\u1EE2\u1ECC\u1ED8\u01EA\u01EC\u00D8\u01FE\u0186\u019F\uA74A\uA74C]/g},
+			{'base':'OE','letters':/[\u0152]/g},
 			{'base':'OI','letters':/[\u01A2]/g},
 			{'base':'OO','letters':/[\uA74E]/g},
 			{'base':'OU','letters':/[\u0222]/g},
@@ -1004,6 +1005,7 @@ Zotero.Utilities = {
 			{'base':'n', 'letters':/[\u006E\u24DD\uFF4E\u01F9\u0144\u00F1\u1E45\u0148\u1E47\u0146\u1E4B\u1E49\u019E\u0272\u0149\uA791\uA7A5]/g},
 			{'base':'nj','letters':/[\u01CC]/g},
 			{'base':'o', 'letters':/[\u006F\u24DE\uFF4F\u00F2\u00F3\u00F4\u1ED3\u1ED1\u1ED7\u1ED5\u00F5\u1E4D\u022D\u1E4F\u014D\u1E51\u1E53\u014F\u022F\u0231\u00F6\u022B\u1ECF\u0151\u01D2\u020D\u020F\u01A1\u1EDD\u1EDB\u1EE1\u1EDF\u1EE3\u1ECD\u1ED9\u01EB\u01ED\u00F8\u01FF\u0254\uA74B\uA74D\u0275]/g},
+			{'base':'oe','letters':/[\u0153]/g},
 			{'base':'oi','letters':/[\u01A3]/g},
 			{'base':'ou','letters':/[\u0223]/g},
 			{'base':'oo','letters':/[\uA74F]/g},