diff --git a/Tools/c-analyzer/c_analyzer/common/files.py b/Tools/c-analyzer/c_analyzer/common/files.py
index ab551a8..f630afe 100644
--- a/Tools/c-analyzer/c_analyzer/common/files.py
+++ b/Tools/c-analyzer/c_analyzer/common/files.py
@@ -41,6 +41,8 @@
 def glob_tree(root, *,
               suffix=None,
               _glob=glob.iglob,
+              _escape=glob.escape,
+              _join=os.path.join,
               ):
     """Yield each file in the tree under the given directory name.
 
@@ -51,9 +53,9 @@
     if not isinstance(suffix, str):
         raise ValueError('suffix must be a string')
 
-    for filename in _glob(f'{root}/*{suffix}'):
+    for filename in _glob(_join(_escape(root), f'*{suffix}')):
         yield filename
-    for filename in _glob(f'{root}/**/*{suffix}'):
+    for filename in _glob(_join(_escape(root), f'**/*{suffix}')):
         yield filename
 
 
diff --git a/Tools/c-analyzer/check-c-globals.py b/Tools/c-analyzer/check-c-globals.py
index e68ed92..1371f92 100644
--- a/Tools/c-analyzer/check-c-globals.py
+++ b/Tools/c-analyzer/check-c-globals.py
@@ -37,7 +37,9 @@
 def find_capi_vars(root):
     capi_vars = {}
     for dirname in SOURCE_DIRS:
-        for filename in glob.glob(os.path.join(ROOT_DIR, dirname, '**/*.[hc]'),
+        for filename in glob.glob(os.path.join(
+                                  glob.escape(os.path.join(ROOT_DIR, dirname)),
+                                  '**/*.[hc]'),
                                   recursive=True):
             with open(filename) as file:
                 for name in _find_capi_vars(file):