diff --git a/security/sandbox/linux/broker/SandboxBrokerPolicyFactory.cpp b/security/sandbox/linux/broker/SandboxBrokerPolicyFactory.cpp
index 8e698606ed0c..a985d257a2c6 100644
--- a/security/sandbox/linux/broker/SandboxBrokerPolicyFactory.cpp
+++ b/security/sandbox/linux/broker/SandboxBrokerPolicyFactory.cpp
@@ -140,9 +140,14 @@ SandboxBrokerPolicyFactory::SandboxBrokerPolicyFactory()
   // Bug 1308851: NVIDIA proprietary driver when using WebGL
   policy->AddPrefix(rdwr, "/dev", "nvidia");
 
-  // Bug 1312678: radeonsi/Intel with DRI when using WebGL
+    // Bug 1312678: radeonsi/Intel with DRI when using WebGL
   policy->AddDir(rdwr, "/dev/dri");
 
+#ifdef MOZ_ALSA
+  // Bug 1309098: ALSA support
+  policy->AddDir(rdwr, "/dev/snd");
+#endif
+
   mCommonContentPolicy.reset(policy);
 #endif
 }
diff --git a/security/sandbox/linux/broker/moz.build b/security/sandbox/linux/broker/moz.build
index 343a5cfad79e..858e1ad83e92 100644
--- a/security/sandbox/linux/broker/moz.build
+++ b/security/sandbox/linux/broker/moz.build
@@ -20,6 +20,9 @@ if CONFIG['OS_TARGET'] == 'Android':
     if CONFIG['MOZ_WIDGET_TOOLKIT'] == 'gonk':
         DEFINES['HAVE_ANDROID_OS'] = True
 
+if CONFIG['MOZ_ALSA']:
+    DEFINES['MOZ_ALSA'] = True
+
 LOCAL_INCLUDES += [
     '/security/sandbox/linux', # SandboxLogging.h, SandboxInfo.h
 ]