diff --git a/MdePkg/Library/BaseDebugLibSerialPort/DebugLib.c b/MdePkg/Library/BaseDebugLibSerialPort/DebugLib.c
index 4a832b87f1..39640119aa 100644
--- a/MdePkg/Library/BaseDebugLibSerialPort/DebugLib.c
+++ b/MdePkg/Library/BaseDebugLibSerialPort/DebugLib.c
@@ -112,7 +112,7 @@ DebugAssert (
   CHAR8  Buffer[MAX_DEBUG_MESSAGE_LENGTH];
 
   //
-  // Generate the ASSERT() message in Unicode format
+  // Generate the ASSERT() message in Ascii format
   //
   AsciiSPrint (Buffer, sizeof (Buffer), "ASSERT %a(%d): %a\n", FileName, LineNumber, Description);