diff --git a/package/x11/thunderbird/thunderbird.conf b/package/x11/thunderbird/thunderbird.conf
index 0361e7137..d5aeec767 100644
--- a/package/x11/thunderbird/thunderbird.conf
+++ b/package/x11/thunderbird/thunderbird.conf
@@ -21,7 +21,7 @@
 # --- ROCK-COPYRIGHT-NOTE-END ---
 
 if [ $prefix_auto = 1 ] ; then
-	prefix="opt/firefox"
+	prefix="opt/thunderbird"
 	set_confopt
 fi