diff --git a/MdeModulePkg/MdeModulePkg.dec b/MdeModulePkg/MdeModulePkg.dec
index dfd2515343..56b85b832a 100644
--- a/MdeModulePkg/MdeModulePkg.dec
+++ b/MdeModulePkg/MdeModulePkg.dec
@@ -141,6 +141,7 @@
   gEfiMdeModulePkgTokenSpaceGuid.PcdPeiCoreMaxPeimPerFv|32|UINT32|0x00010031
   gEfiMdeModulePkgTokenSpaceGuid.PcdPeiCoreMaxPeiStackSize|0x20000|UINT32|0x00010032
   gEfiMdeModulePkgTokenSpaceGuid.PcdPeiCoreMaxPpiSupported|64|UINT32|0x00010033
+  gEfiMdeModulePkgTokenSpaceGuid.PcdRealTimeClockUpdateTimeout|100000|UINT32|0x00010034
   gEfiMdeModulePkgTokenSpaceGuid.PcdFlashNvStorageVariableBase|0x0|UINT32|0x30000001
   gEfiMdeModulePkgTokenSpaceGuid.PcdFlashNvStorageVariableSize|0x0|UINT32|0x30000002
   gEfiMdeModulePkgTokenSpaceGuid.PcdMaxVariableSize|0x400|UINT32|0x30000003
diff --git a/MdeModulePkg/Universal/PcatRealTimeClockRuntimeDxe/PcRtc.c b/MdeModulePkg/Universal/PcatRealTimeClockRuntimeDxe/PcRtc.c
index 057c0407b2..ccd1c4f297 100644
--- a/MdeModulePkg/Universal/PcatRealTimeClockRuntimeDxe/PcRtc.c
+++ b/MdeModulePkg/Universal/PcatRealTimeClockRuntimeDxe/PcRtc.c
@@ -146,7 +146,7 @@ Returns:
   //
   // Wait for up to 0.1 seconds for the RTC to be updated
   //
-  Status = RtcWaitToUpdate (100000);
+  Status = RtcWaitToUpdate (PcdGet32 (PcdRealTimeClockUpdateTimeout));
   if (EFI_ERROR (Status)) {
   	//BugBug: the EfiAtRuntime should be encapsulated in EfiAcquireLock or
     //        provide a new instance for EfiAcquireLock, say, RtEfiAcquireLock
@@ -272,7 +272,7 @@ Routine Description:
   //
   // Wait for up to 0.1 seconds for the RTC to be updated
   //
-  Status = RtcWaitToUpdate (100000);
+  Status = RtcWaitToUpdate (PcdGet32 (PcdRealTimeClockUpdateTimeout));
   if (EFI_ERROR (Status)) {
   	  //BugBug: the EfiAtRuntime should be encapsulated in EfiReleaseLock or
       //        provide a new instance for EfiReleaseLock, say, RtEfiReleaseLock
@@ -391,7 +391,7 @@ Routine Description:
   //
   // Wait for up to 0.1 seconds for the RTC to be updated
   //
-  Status = RtcWaitToUpdate (100000);
+  Status = RtcWaitToUpdate (PcdGet32 (PcdRealTimeClockUpdateTimeout));
   if (EFI_ERROR (Status)) {
   	 //BugBug: the EfiAtRuntime should be encapsulated in EfiReleaseLock or
      //        provide a new instance for EfiReleaseLock, say, RtEfiReleaseLock
@@ -504,7 +504,7 @@ Returns:
   //
   // Wait for up to 0.1 seconds for the RTC to be updated
   //
-  Status = RtcWaitToUpdate (100000);
+  Status = RtcWaitToUpdate (PcdGet32 (PcdRealTimeClockUpdateTimeout));
   if (EFI_ERROR (Status)) {
   	//BugBug: the EfiAtRuntime should be encapsulated in EfiReleaseLock or
     //        provide a new instance for EfiReleaseLock, say, RtEfiReleaseLock
@@ -636,7 +636,7 @@ Returns:
   //
   // Wait for up to 0.1 seconds for the RTC to be updated
   //
-  Status = RtcWaitToUpdate (100000);
+  Status = RtcWaitToUpdate (PcdGet32 (PcdRealTimeClockUpdateTimeout));
   if (EFI_ERROR (Status)) {
     //BugBug: the EfiAtRuntime should be encapsulated in EfiReleaseLock or
     //        provide a new instance for EfiReleaseLock, say, RtEfiReleaseLock
diff --git a/MdeModulePkg/Universal/PcatRealTimeClockRuntimeDxe/PcatRealTimeClockRuntimeDxe.inf b/MdeModulePkg/Universal/PcatRealTimeClockRuntimeDxe/PcatRealTimeClockRuntimeDxe.inf
index f464369bd1..ef5451a602 100644
--- a/MdeModulePkg/Universal/PcatRealTimeClockRuntimeDxe/PcatRealTimeClockRuntimeDxe.inf
+++ b/MdeModulePkg/Universal/PcatRealTimeClockRuntimeDxe/PcatRealTimeClockRuntimeDxe.inf
@@ -62,4 +62,6 @@
 
 [Depex]
   gEfiVariableArchProtocolGuid AND gEfiVariableWriteArchProtocolGuid
-  
\ No newline at end of file
+  
+[Pcd]
+  gEfiMdeModulePkgTokenSpaceGuid.PcdRealTimeClockUpdateTimeout
\ No newline at end of file