diff --git a/MdeModulePkg/MdeModulePkg.dec b/MdeModulePkg/MdeModulePkg.dec
index 19935c88fa..17beb45235 100644
--- a/MdeModulePkg/MdeModulePkg.dec
+++ b/MdeModulePkg/MdeModulePkg.dec
@@ -1128,10 +1128,6 @@
   # @Prompt Maximum number of PEI performance log entries.
   gEfiMdeModulePkgTokenSpaceGuid.PcdMaxPeiPerformanceLogEntries16|0|UINT16|0x00010035
 
-  ## RTC Update Timeout Value(microsecond).
-  # @Prompt RTC Update Timeout Value.
-  gEfiMdeModulePkgTokenSpaceGuid.PcdRealTimeClockUpdateTimeout|100000|UINT32|0x00010034
-
   ## Indicates the 16550 serial port registers are in MMIO space, or in I/O space. Default is I/O space.<BR><BR>
   #   TRUE  - 16550 serial port registers are in MMIO space.<BR>
   #   FALSE - 16550 serial port registers are in I/O space.<BR>
diff --git a/MdeModulePkg/MdeModulePkg.uni b/MdeModulePkg/MdeModulePkg.uni
index 29d0a70ce0..b4e8142199 100644
--- a/MdeModulePkg/MdeModulePkg.uni
+++ b/MdeModulePkg/MdeModulePkg.uni
@@ -150,10 +150,6 @@
                                                                                                   "entries. If greater than 0, then this PCD determines the number of entries,\n"
                                                                                                   "and PcdMaxPeiPerformanceLogEntries is ignored."
 
-#string STR_gEfiMdeModulePkgTokenSpaceGuid_PcdRealTimeClockUpdateTimeout_PROMPT  #language en-US "RTC Update Timeout Value"
-
-#string STR_gEfiMdeModulePkgTokenSpaceGuid_PcdRealTimeClockUpdateTimeout_HELP  #language en-US "RTC Update Timeout Value(microsecond)."
-
 #string STR_gEfiMdeModulePkgTokenSpaceGuid_PcdSerialUseMmio_PROMPT  #language en-US "Serial port registers use MMIO"
 
 #string STR_gEfiMdeModulePkgTokenSpaceGuid_PcdSerialUseMmio_HELP  #language en-US "Indicates the 16550 serial port registers are in MMIO space, or in I/O space. Default is I/O space.<BR><BR>\n"