diff --git a/MdePkg/Library/BaseTimerLibLocalApic/x86TimerLib.c b/MdePkg/Library/BaseTimerLibLocalApic/x86TimerLib.c
index a656a80c4c..dd240d88d0 100644
--- a/MdePkg/Library/BaseTimerLibLocalApic/x86TimerLib.c
+++ b/MdePkg/Library/BaseTimerLibLocalApic/x86TimerLib.c
@@ -210,7 +210,7 @@ GetPerformanceCounter (
   VOID
   )
 {
-  return InternalX86GetTimerTick (InternalX86GetApicBase ());
+  return (UINT32)InternalX86GetTimerTick (InternalX86GetApicBase ());
 }
 
 /**