diff --git a/ipc/mscom/moz.build b/ipc/mscom/moz.build
index 78d2dd6d25ff..fa584a34b09f 100644
--- a/ipc/mscom/moz.build
+++ b/ipc/mscom/moz.build
@@ -90,3 +90,4 @@ FINAL_LIBRARY = "xul"
 
 with Files("**"):
     BUG_COMPONENT = ("Core", "IPC: MSCOM")
+    SCHEDULES.exclusive = ["windows"]