diff --git a/setup.py b/setup.py
index ee4c54dc..a552b9d6 100644
--- a/setup.py
+++ b/setup.py
@@ -2,7 +2,7 @@ from setuptools import setup, find_packages
 
 
 setup(name='thefuck',
-      version="1.21",
+      version="1.22",
       description="Magnificent app which corrects your previous console command",
       author='Vladimir Iakovlev',
       author_email='nvbn.rm@gmail.com',
diff --git a/thefuck/rules/no_command.py b/thefuck/rules/no_command.py
index cfeab056..ce90926c 100644
--- a/thefuck/rules/no_command.py
+++ b/thefuck/rules/no_command.py
@@ -12,8 +12,8 @@ def _safe(fn, fallback):
 
 def _get_all_bins():
     return [exe.name
-            for path in os.environ['PATH'].split(':')
-            for exe in _safe(lambda: Path(path).iterdir(), [])
+            for path in os.environ.get('PATH', '').split(':')
+            for exe in _safe(lambda: list(Path(path).iterdir()), [])
             if not _safe(exe.is_dir, True)]