--- a/toolkit/modules/UpdateUtils.jsm
+++ b/toolkit/modules/UpdateUtils.jsm
@@ -256,16 +256,22 @@ XPCOMUtils.defineLazyGetter(UpdateUtils,
 
     if (macutils.isUniversalBinary) {
       abi += "-u-" + macutils.architecturesInBinary;
     }
   } else if (AppConstants.platform == "win") {
     // Windows build should report the CPU architecture that it's running on.
     abi += "-" + gWinCPUArch;
   }
+
+  if (AppConstants.ASAN) {
+    // Allow ASan builds to receive their own updates
+    abi += "-asan";
+  }
+
   return abi;
 });
 
 XPCOMUtils.defineLazyGetter(UpdateUtils, "OSVersion", function() {
   let osVersion;
   try {
     osVersion = Services.sysinfo.getProperty("name") + " " +
                 Services.sysinfo.getProperty("version");