diff --git a/mozilla/toolkit/components/help/content/help.xul b/mozilla/toolkit/components/help/content/help.xul
index 1d26d304188..8d70353d40b 100644
--- a/mozilla/toolkit/components/help/content/help.xul
+++ b/mozilla/toolkit/components/help/content/help.xul
@@ -108,6 +108,8 @@
             command="cmd_closeWindow" modifiers="accel"/>
         <key id="key_textZoomEnlarge" key="&textZoomEnlargeCmd.commandkey;"
             command="cmd_textZoomEnlarge" modifiers="accel"/>
+        <key id="key_textZoomEnlarge2" key="&textZoomEnlargeCmd.commandkey2;"
+            command="cmd_textZoomEnlarge" modifiers="accel"/>
         <key id="key_textZoomReduce" key="&textZoomReduceCmd.commandkey;"
             command="cmd_textZoomReduce" modifiers="accel"/>
         <key id="key_toggleSidebar" keycode="VK_F9" command="Help:ToggleSidebar"/>
diff --git a/mozilla/toolkit/components/help/locale/en-US/help.dtd b/mozilla/toolkit/components/help/locale/en-US/help.dtd
index d5f4d53eb0f..8bec1df7850 100644
--- a/mozilla/toolkit/components/help/locale/en-US/help.dtd
+++ b/mozilla/toolkit/components/help/locale/en-US/help.dtd
@@ -51,3 +51,4 @@
 
 <!ENTITY textZoomReduceCmd.commandkey	"-">
 <!ENTITY textZoomEnlargeCmd.commandkey	"+">
+<!ENTITY textZoomEnlargeCmd.commandkey2 "="> <!-- + is above this key on many keyboards -->