diff --git a/make.js b/make.js
index 60b95c713..f2e499f8a 100755
--- a/make.js
+++ b/make.js
@@ -280,7 +280,7 @@ target.firefox = function() {
   // Update the build version number
   sed('-i', /PDFJSSCRIPT_VERSION/, EXTENSION_VERSION, FIREFOX_BUILD_DIR + '/install.rdf');
   sed('-i', /PDFJSSCRIPT_VERSION/, EXTENSION_VERSION, FIREFOX_BUILD_DIR + '/update.rdf');
-  sed('-i', /PDFJSSCRIPT_VERSION/, EXTENSION_VERSION, FIREFOX_BUILD_DIR + '/update.rdf.in');
+  sed('-i', /PDFJSSCRIPT_VERSION/, EXTENSION_VERSION, FIREFOX_BUILD_DIR + '/install.rdf.in');
   sed('-i', /PDFJSSCRIPT_VERSION/, EXTENSION_VERSION, FIREFOX_BUILD_DIR + '/README.mozilla');
 
   // Create the xpi