diff --git a/toolkit/locales/en-US/chrome/mozapps/downloads/unknownContentType.dtd b/toolkit/locales/en-US/chrome/mozapps/downloads/unknownContentType.dtd
index f7986706dd74..e0fbf7368e0d 100644
--- a/toolkit/locales/en-US/chrome/mozapps/downloads/unknownContentType.dtd
+++ b/toolkit/locales/en-US/chrome/mozapps/downloads/unknownContentType.dtd
@@ -16,7 +16,7 @@
 <!ENTITY  rememberChoice.label        "Do this automatically for files like this from now on.">
 <!ENTITY  rememberChoice.accesskey    "a">
 
-<!ENTITY  whichIsA.label              "which is a:">
+<!ENTITY  whichIs.label              "which is:">
 
 <!ENTITY  chooseHandlerMac.label      "Choose…">
 <!ENTITY  chooseHandlerMac.accesskey  "C">
diff --git a/toolkit/mozapps/downloads/content/unknownContentType.xul b/toolkit/mozapps/downloads/content/unknownContentType.xul
index 93f51aaa2d90..871fd7b20209 100644
--- a/toolkit/mozapps/downloads/content/unknownContentType.xul
+++ b/toolkit/mozapps/downloads/content/unknownContentType.xul
@@ -43,7 +43,7 @@
         <description id="location" class="plain" crop="start" flex="1"/>
         <separator class="thin"/>
         <hbox align="center">
-          <label value="&whichIsA.label;" id="whichIsA"/>
+          <label value="&whichIs.label;"/>
           <textbox id="type" class="plain" readonly="true" flex="1" noinitialfocus="true"/>
         </hbox>
         <hbox align="center">