diff --git a/Misc/NEWS.d/next/Tools-Demos/2021-09-14-11-44-26.bpo-44786.DU0LC0.rst b/Misc/NEWS.d/next/Tools-Demos/2021-09-14-11-44-26.bpo-44786.DU0LC0.rst
new file mode 100644
index 00000000000..96ebf2c33cc
--- /dev/null
+++ b/Misc/NEWS.d/next/Tools-Demos/2021-09-14-11-44-26.bpo-44786.DU0LC0.rst
@@ -0,0 +1 @@
+Fix a warning in regular expression in the c-analyzer script.
diff --git a/Tools/c-analyzer/c_common/tables.py b/Tools/c-analyzer/c_common/tables.py
index 85b50192571..130be6beba5 100644
--- a/Tools/c-analyzer/c_common/tables.py
+++ b/Tools/c-analyzer/c_common/tables.py
@@ -236,12 +236,12 @@ def build_table(specs, *, sep=' ', defaultwidth=None):
 _COLSPEC_RE = re.compile(textwrap.dedent(r'''
     ^
     (?:
-        [[]
+        \[
         (
             (?: [^\s\]] [^\]]* )?
             [^\s\]]
         )  # <label>
-        []]
+        ]
     )?
     ( \w+ )  # <field>
     (?: