diff --git a/extra/firefox/PKGBUILD b/extra/firefox/PKGBUILD
index aeaef2110..acbbfb1d8 100644
--- a/extra/firefox/PKGBUILD
+++ b/extra/firefox/PKGBUILD
@@ -6,6 +6,7 @@
 #  - changed GCC from 4.6 to system default
 
 buildarch=4
+highmem=1
 
 pkgname=firefox
 pkgver=13.0.1