diff --git a/undetected_chromedriver/__init__.py b/undetected_chromedriver/__init__.py
index e8da4e6..57c04bd 100644
--- a/undetected_chromedriver/__init__.py
+++ b/undetected_chromedriver/__init__.py
@@ -689,12 +689,13 @@ def find_chrome_executable():
         for item in map(
             os.environ.get, ("PROGRAMFILES", "PROGRAMFILES(X86)", "LOCALAPPDATA")
         ):
-            for subitem in (
-                "Google/Chrome/Application",
-                "Google/Chrome Beta/Application",
-                "Google/Chrome Canary/Application",
-            ):
-                candidates.add(os.sep.join((item, subitem, "chrome.exe")))
+            if item is not None:
+                for subitem in (
+                    "Google/Chrome/Application",
+                    "Google/Chrome Beta/Application",
+                    "Google/Chrome Canary/Application",
+                ):
+                    candidates.add(os.sep.join((item, subitem, "chrome.exe")))
     for candidate in candidates:
         if os.path.exists(candidate) and os.access(candidate, os.X_OK):
             return os.path.normpath(candidate)