diff --git a/extra/firefox/PKGBUILD b/extra/firefox/PKGBUILD
index 9f4039d67..62bfc3e64 100644
--- a/extra/firefox/PKGBUILD
+++ b/extra/firefox/PKGBUILD
@@ -19,14 +19,16 @@ install=firefox.install
 options=('!emptydirs' '!makeflags')
 source=(https://ftp.mozilla.org/pub/mozilla.org/firefox/releases/$pkgver/source/firefox-$pkgver.source.tar.bz2
         mozconfig firefox.desktop firefox-install-dir.patch vendor.js shared-libs.patch
-        firefox-20.0.1-fixed-loading-icon.png)
+        firefox-20.0.1-fixed-loading-icon.png
+	alarm.patch)
 sha256sums=('3909031cb5d403b12c796afb7775b4950f0347786ffd06028761852a1074d91c'
             '7a519745d9b0bb91a7d2cf4c266c84bf5a6c964670db2981737e787a6fbdfe67'
             'd2a7610393ba259c35e3227b92e02ec91095a95189f56ac93ccdf6732772719c'
             'ded67e8204bd5e1c0c5771c0d2c84ff80c998e1543711e7cd804cfe29e8dd1b0'
             '4b50e9aec03432e21b44d18c4c97b2630bace606b033f7d556c9d3e3eb0f4fa4'
             'e2b4a00d14f4ba69c62b3f9ef9908263fbab179ba8004197cbc67edbd916fdf1'
-            '68e3a5b47c6d175cc95b98b069a15205f027cab83af9e075818d38610feb6213')
+            '68e3a5b47c6d175cc95b98b069a15205f027cab83af9e075818d38610feb6213'
+            '6297c56f197b07ca29b31b3d51dedb86ddd3b57c0651e75a45156e2062b048e0')
 
 prepare() {
   cd mozilla-release
@@ -34,6 +36,7 @@ prepare() {
   cp ../mozconfig .mozconfig
   patch -Np1 -i ../firefox-install-dir.patch
   patch -Np1 -i ../shared-libs.patch
+  patch -Np0 -i ../alarm.patch
 
   # Fix PRE_RELEASE_SUFFIX
   sed -i '/^PRE_RELEASE_SUFFIX := ""/s/ ""//' \
diff --git a/extra/firefox/alarm.patch b/extra/firefox/alarm.patch
new file mode 100644
index 000000000..142bb7b38
--- /dev/null
+++ b/extra/firefox/alarm.patch
@@ -0,0 +1,11 @@
+--- js/src/ion/shared/IonAssemblerBufferWithConstantPools.h.orig	2013-06-21 16:17:35.029032287 -0500
++++ js/src/ion/shared/IonAssemblerBufferWithConstantPools.h	2013-06-21 16:18:05.842731689 -0500
+@@ -675,7 +675,7 @@
+         JS_ASSERT(perforatedNode != NULL);
+         if (numDumps >= (1<<logBasePoolInfo) && (numDumps & (numDumps-1)) == 0) {
+             // need to resize.
+-            poolInfo = static_cast<PoolInfo*>(realloc_(poolInfo, sizeof(PoolInfo) * numDumps,
++            poolInfo = static_cast<PoolInfo*>(this->realloc_(poolInfo, sizeof(PoolInfo) * numDumps,
+                                                        sizeof(PoolInfo) * numDumps * 2));
+             if (poolInfo == NULL) {
+                 this->fail_oom();