diff --git a/src/mod/languages/mod_spidermonkey/mod_spidermonkey.c b/src/mod/languages/mod_spidermonkey/mod_spidermonkey.c
index b5a19b8ff2..76c957778f 100644
--- a/src/mod/languages/mod_spidermonkey/mod_spidermonkey.c
+++ b/src/mod/languages/mod_spidermonkey/mod_spidermonkey.c
@@ -2233,6 +2233,9 @@ static JSBool session_detach(JSContext * cx, JSObject * obj, uintN argc, jsval *
 				int32 i = 0;
 				JS_ValueToInt32(cx, argv[0], &i);
 				cause = i;
+			} else {
+				const char *cause_name = JS_GetStringBytes(JS_ValueToString(cx, argv[0]));
+				cause = switch_channel_str2cause(cause_name);
 			}
 		}