diff --git a/MdePkg/Library/UefiDebugLibDebugPortProtocol/DebugLibConstructor.c b/MdePkg/Library/UefiDebugLibDebugPortProtocol/DebugLibConstructor.c
index 298d17c6a0..7ddecd0b62 100644
--- a/MdePkg/Library/UefiDebugLibDebugPortProtocol/DebugLibConstructor.c
+++ b/MdePkg/Library/UefiDebugLibDebugPortProtocol/DebugLibConstructor.c
@@ -34,9 +34,10 @@ EFI_BOOT_SERVICES  *mDebugBS;
   @param  Context      Pointer to the notification function's context.
 
 **/
+static
 VOID
 EFIAPI
-ExitBootServicesCallback (
+UefiDebugLibDebugPortProtocolExitBootServicesCallback (
   EFI_EVENT  Event,
   VOID       *Context
   )
@@ -67,7 +68,7 @@ DxeDebugLibConstructor (
   mDebugBS->CreateEvent (
               EVT_SIGNAL_EXIT_BOOT_SERVICES,
               TPL_NOTIFY,
-              ExitBootServicesCallback,
+              UefiDebugLibDebugPortProtocolExitBootServicesCallback,
               NULL,
               &mExitBootServicesEvent
               );