diff --git a/src/CallHandler.tsx b/src/CallHandler.tsx
index 0268ebfe46..90a631ab7f 100644
--- a/src/CallHandler.tsx
+++ b/src/CallHandler.tsx
@@ -462,6 +462,9 @@ export default class CallHandler extends EventEmitter {
                         if (call.hangupReason === CallErrorCode.UserHangup) {
                             title = _t("Call Declined");
                             description = _t("The other party declined the call.");
+                        } else if (call.hangupReason === CallErrorCode.UserBusy) {
+                            title = _t("User Busy");
+                            description = _t("The user you called is busy.");
                         } else if (call.hangupReason === CallErrorCode.InviteTimeout) {
                             title = _t("Call Failed");
                             // XXX: full stop appended as some relic here, but these
diff --git a/src/i18n/strings/en_EN.json b/src/i18n/strings/en_EN.json
index 1b04ae3b89..3d6fcb8643 100644
--- a/src/i18n/strings/en_EN.json
+++ b/src/i18n/strings/en_EN.json
@@ -37,6 +37,8 @@
     "Call Failed": "Call Failed",
     "Call Declined": "Call Declined",
     "The other party declined the call.": "The other party declined the call.",
+    "User Busy": "User Busy",
+    "The user you called is busy.": "The user you called is busy.",
     "The remote side failed to pick up": "The remote side failed to pick up",
     "The call could not be established": "The call could not be established",
     "Answered Elsewhere": "Answered Elsewhere",