diff --git a/BaseTools/Source/Python/AutoGen/GenMake.py b/BaseTools/Source/Python/AutoGen/GenMake.py
index b4377eef17..d94d8f9368 100644
--- a/BaseTools/Source/Python/AutoGen/GenMake.py
+++ b/BaseTools/Source/Python/AutoGen/GenMake.py
@@ -30,7 +30,7 @@ from collections import OrderedDict
 from Common.DataType import TAB_COMPILER_MSFT
 
 ## Regular expression for finding header file inclusions
-gIncludePattern = re.compile(r"^[ \t]*#?[ \t]*include(?:[ \t]*(?:\\(?:\r\n|\r|\n))*[ \t]*)*(?:\(?[\"<]?[ \t]*)([-\w.\\/() \t]+)(?:[ \t]*[\">]?\)?)", re.MULTILINE | re.UNICODE | re.IGNORECASE)
+gIncludePattern = re.compile(r"^[ \t]*[#%]?[ \t]*include(?:[ \t]*(?:\\(?:\r\n|\r|\n))*[ \t]*)*(?:\(?[\"<]?[ \t]*)([-\w.\\/() \t]+)(?:[ \t]*[\">]?\)?)", re.MULTILINE | re.UNICODE | re.IGNORECASE)
 
 ## Regular expression for matching macro used in header file inclusion
 gMacroPattern = re.compile("([_A-Z][_A-Z0-9]*)[ \t]*\((.+)\)", re.UNICODE)