diff --git a/firefox.spec b/firefox.spec
index df6d490..e490875 100644
--- a/firefox.spec
+++ b/firefox.spec
@@ -319,6 +319,8 @@ fi
 %{mozappdir}/.autoreg
 # XXX See if these are needed still
 %{mozappdir}/updater*
+# provided by XULRunner
+%exclude %{mozappdir}/jemalloc.so
 
 #---------------------------------------------------------------------