diff --git a/toolkit/components/maintenanceservice/moz.build b/toolkit/components/maintenanceservice/moz.build
index a4dae3f..312873c 100644
--- a/toolkit/components/maintenanceservice/moz.build
+++ b/toolkit/components/maintenanceservice/moz.build
@@ -18,7 +18,7 @@ USE_LIBS += [
 ]
 
 # For debugging purposes only
-# DEFINES['DISABLE_UPDATER_AUTHENTICODE_CHECK'] = True
+DEFINES['DISABLE_UPDATER_AUTHENTICODE_CHECK'] = True
 
 DEFINES["UNICODE"] = True
 DEFINES["_UNICODE"] = True
diff --git a/toolkit/mozapps/update/tests/moz.build b/toolkit/mozapps/update/tests/moz.build
index 1a52a88..59d100c 100644
--- a/toolkit/mozapps/update/tests/moz.build
+++ b/toolkit/mozapps/update/tests/moz.build
@@ -59,7 +59,7 @@ if CONFIG["MOZ_MAINTENANCE_SERVICE"]:
     DEFINES["MOZ_MAINTENANCE_SERVICE"] = CONFIG["MOZ_MAINTENANCE_SERVICE"]
 
 # For debugging purposes only
-# DEFINES['DISABLE_UPDATER_AUTHENTICODE_CHECK'] = True
+DEFINES['DISABLE_UPDATER_AUTHENTICODE_CHECK'] = True
 
 if CONFIG["CC_TYPE"] == "clang-cl":
     WIN32_EXE_LDFLAGS += ["-ENTRY:wmainCRTStartup"]