diff --git a/ament_cpplint/ament_cpplint/cpplint.py b/ament_cpplint/ament_cpplint/cpplint.py
index 75eacc01d..b1b925c9a 100644
--- a/ament_cpplint/ament_cpplint/cpplint.py
+++ b/ament_cpplint/ament_cpplint/cpplint.py
@@ -191,7 +191,7 @@
 
       Example file:
         filter=-build/include_order,+build/include_alpha
-        exclude_files=.*\.cc
+        exclude_files=.*\\.cc
 
     The above example disables build/include_order warning and enables
     build/include_alpha as well as excludes all .cc from being
@@ -1104,7 +1104,7 @@ def RepositoryName(self):
     If we have a real absolute path name here we can try to do something smart:
     detecting the root of the checkout and truncating /path/to/checkout from
     the name so that we get header guards that don't include things like
-    "C:\Documents and Settings\..." or "/home/username/..." in them and thus
+    "C:\\Documents and Settings\\..." or "/home/username/..." in them and thus
     people on different computers who have checked the source out to different
     locations won't see bogus errors.
     """
diff --git a/ament_lint_cmake/ament_lint_cmake/cmakelint.py b/ament_lint_cmake/ament_lint_cmake/cmakelint.py
index c2c5e6e11..72754bd37 100644
--- a/ament_lint_cmake/ament_lint_cmake/cmakelint.py
+++ b/ament_lint_cmake/ament_lint_cmake/cmakelint.py
@@ -121,7 +121,7 @@ def Check(self, filename, linenumber, clean_lines, errors):
 
     def _GetExpected(self, filename):
         package = os.path.basename(filename)
-        package = re.sub('^Find(.*)\.cmake', lambda m: m.group(1), package)
+        package = re.sub(r'^Find(.*)\.cmake', lambda m: m.group(1), package)
         return package.upper()
 
     def Done(self, filename, errors):
@@ -332,7 +332,7 @@ def CheckStyle(filename, linenumber, clean_lines, errors):
     CheckRepeatLogic(filename, linenumber, clean_lines, errors)
 
 def CheckFileName(filename, errors):
-    name_match = re.match('Find(.*)\.cmake', os.path.basename(filename))
+    name_match = re.match(r'Find(.*)\.cmake', os.path.basename(filename))
     if name_match:
         package = name_match.group(1)
         if not package.isupper():