diff --git a/DuetPkg/DuetPkg.dsc b/DuetPkg/DuetPkg.dsc
index 13a4d781fd..41f8c237f7 100644
--- a/DuetPkg/DuetPkg.dsc
+++ b/DuetPkg/DuetPkg.dsc
@@ -12,6 +12,7 @@
 
 [LibraryClasses.common]
   BaseLib|MdePkg/Library/BaseLib/BaseLib.inf
+  SynchronizationLib|MdePkg/Library/BaseSynchronizationLib/BaseSynchronizationLib.inf
   DebugLib|IntelFrameworkModulePkg/Library/PeiDxeDebugLibReportStatusCode/PeiDxeDebugLibReportStatusCode.inf
   BaseMemoryLib|MdePkg/Library/BaseMemoryLib/BaseMemoryLib.inf
   PcdLib|MdePkg/Library/BasePcdLibNull/BasePcdLibNull.inf