diff --git a/CHANGELOG.md b/CHANGELOG.md
index 9b9357e9..2a9afdfd 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -23,6 +23,7 @@ Breaking changes:
 * Change all usages of `HashMap` to `BTreeMap`
 * Change the messages type that gets sent out using the `r0::client_exchange::send_event_to_device`
   request.
+* Add `M_USER_DEACTIVATED` to `error::ErrorKind`
 
 Improvements:
 
diff --git a/src/error.rs b/src/error.rs
index efbe5d28..1fb19521 100644
--- a/src/error.rs
+++ b/src/error.rs
@@ -51,6 +51,10 @@ pub enum ErrorKind {
     #[serde(rename = "M_UNAUTHORIZED")]
     #[strum(to_string = "M_UNAUTHORIZED")]
     Unauthorized,
+    /// M_USER_DEACTIVATED
+    #[serde(rename = "M_USER_DEACTIVATED")]
+    #[strum(to_string = "M_USER_DEACTIVATED")]
+    UserDeactivated,
     /// M_USER_IN_USE
     #[serde(rename = "M_USER_IN_USE")]
     #[strum(to_string = "M_USER_IN_USE")]