diff --git a/OvmfPkg/Library/QemuBootOrderLib/QemuBootOrderLib.inf b/OvmfPkg/Library/QemuBootOrderLib/QemuBootOrderLib.inf
index eec938f198..deb123a601 100644
--- a/OvmfPkg/Library/QemuBootOrderLib/QemuBootOrderLib.inf
+++ b/OvmfPkg/Library/QemuBootOrderLib/QemuBootOrderLib.inf
@@ -31,8 +31,8 @@
 #
 
 [Sources]
-  QemuBootOrderLib.c
   ExtraRootBusMap.c
+  QemuBootOrderLib.c
 
 [Packages]
   MdePkg/MdePkg.dec