diff --git a/firefox.spec b/firefox.spec
index 74a39ee..bb81450 100644
--- a/firefox.spec
+++ b/firefox.spec
@@ -203,7 +203,7 @@ Files and macros mainly for building Firefox extensions.
 %endif
 %endif
 
-%patch15 -p2 -b .addons
+%patch90 -p2 -b .addons
 
 pushd js/src
 autoconf-2.13