diff --git a/addons/thunderbird/plugin/openerp_plugin.xpi b/addons/thunderbird/plugin/openerp_plugin.xpi
index 50a55a626e4..d48a2a5c45e 100644
Binary files a/addons/thunderbird/plugin/openerp_plugin.xpi and b/addons/thunderbird/plugin/openerp_plugin.xpi differ
diff --git a/addons/thunderbird/plugin/openerp_plugin/chrome/openerp_plugin.jar b/addons/thunderbird/plugin/openerp_plugin/chrome/openerp_plugin.jar
index c52c70bf74e..cf2c5037405 100644
Binary files a/addons/thunderbird/plugin/openerp_plugin/chrome/openerp_plugin.jar and b/addons/thunderbird/plugin/openerp_plugin/chrome/openerp_plugin.jar differ
diff --git a/addons/thunderbird/plugin/openerp_plugin/makefile b/addons/thunderbird/plugin/openerp_plugin/makefile
index 711fdfe117e..17ed0319bcc 100644
--- a/addons/thunderbird/plugin/openerp_plugin/makefile
+++ b/addons/thunderbird/plugin/openerp_plugin/makefile
@@ -1,7 +1,7 @@
 all: xpi
 
 jar:
-	jar cvf chrome/openerp_plugin.jar chrome/openerp_plugin/*
+	jar cvf chrome/openerp_plugin.jar -C chrome/openerp_plugin/ .
 
 xpi: jar
 	zip -r ../openerp_plugin.xpi *