1 files changed, 11 insertions, 0 deletions

diff --git a/freestyle_hid/_exceptions.py b/freestyle_hid/_exceptions.py
index 38a822d..2b803f8 100644
--- a/freestyle_hid/_exceptions.py
+++ b/freestyle_hid/_exceptions.py
@@ -16,3 +16,14 @@ class ChecksumError(Exception):
 
 class CommandError(Exception):
     """Errors related to the command stream."""
+
+
+class MissingFreeStyleKeys(Exception):
+    """The freestyle-hid-keys package is missing."""
+
+    def __init__(self):
+        super().__init__(
+            "The freestyle-hid-keys package is missing, please install it from PyPi."
+            " You can install freestyle-hid[encryption] to select the encryption keys"
+            " package as an extra dependency."
+        )