This was missing at OP regex.

Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
---
 tools/lib/python/kdoc/c_lex.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/tools/lib/python/kdoc/c_lex.py b/tools/lib/python/kdoc/c_lex.py
index 689ad64ecbe4..a61f5fe88363 100644
--- a/tools/lib/python/kdoc/c_lex.py
+++ b/tools/lib/python/kdoc/c_lex.py
@@ -100,7 +100,7 @@ TOKEN_LIST = [
     (CToken.HASH,    r"#"),
 
     (CToken.OP,      r"\+\+|\-\-|\->|==|\!=|<=|>=|&&|\|\||<<|>>|\+=|\-=|\*=|/=|%="
-                     r"|&=|\|=|\^=|=|\+|\-|\*|/|%|<|>|&|\||\^|~|!|\?|\:"),
+                     r"|&=|\|=|\^=|=|\+|\-|\*|/|%|<|>|&|\||\^|~|!|\?|\:|\@"),
 
     (CToken.STRUCT,  r"\bstruct\b"),
     (CToken.UNION,   r"\bunion\b"),
-- 
2.52.0