diff --git a/flake8_mypy.py b/flake8_mypy.py
index 5560f2b..efb08ad 100644
--- a/flake8_mypy.py
+++ b/flake8_mypy.py
@@ -279,7 +279,7 @@ def build_mypy_re(self, filename: Union[str, Path]) -> Pattern:
             except ValueError:
                 pass   # not relative to the cwd
 
-        re_filename = str(filename).replace('.', r'\.')
+        re_filename = re.escape(str(filename))
         if re_filename.startswith(r'\./'):
             re_filename = re_filename[3:]
         return re.compile(