diff --git a/MdePkg/Include/Pi/PiHob.h b/MdePkg/Include/Pi/PiHob.h
index 2089a4ceda..e1926ce67a 100644
--- a/MdePkg/Include/Pi/PiHob.h
+++ b/MdePkg/Include/Pi/PiHob.h
@@ -76,7 +76,7 @@ typedef struct {
 /// 
 typedef struct {
   ///
-  /// A GUID that defines the memory allocation region¡¯s type and purpose, as well as
+  /// A GUID that defines the memory allocation region's type and purpose, as well as
   /// other fields within the memory allocation HOB. This GUID is used to define the
   /// additional data within the HOB that may be present for the memory allocation HOB.
   /// Type EFI_GUID is defined in InstallProtocolInterface() in the UEFI 2.0
diff --git a/MdePkg/Include/Pi/PiPeiCis.h b/MdePkg/Include/Pi/PiPeiCis.h
index e2d2d75748..4db59a3cde 100644
--- a/MdePkg/Include/Pi/PiPeiCis.h
+++ b/MdePkg/Include/Pi/PiPeiCis.h
@@ -576,7 +576,7 @@ typedef struct {
   ///
   VOID                    *Buffer;
   ///
-  /// Size of the file’s data.
+  /// Size of the file's data.
   ///
   UINT32                  BufferSize;
 } EFI_FV_FILE_INFO;