diff --git a/examples/fs_info.py b/examples/fs_info.py
index d00e615..ef30953 100755
--- a/examples/fs_info.py
+++ b/examples/fs_info.py
@@ -2,11 +2,17 @@
 
 import btrfs
 import sys
+from pathlib import Path
 
 if len(sys.argv) < 2:
     print("Usage: {} <mountpoint>".format(sys.argv[0]))
     sys.exit(1)
 
+mountpoint = Path(sys.argv[1])
+if not mountpoint.is_dir():
+    print(f"Error: {mountpoint} is not a valid directory")
+    sys.exit(1)
+
 with btrfs.FileSystem(sys.argv[1]) as fs:
     fs_info = fs.fs_info()
     print(fs_info)