diff --git a/src/ui/mucwin.c b/src/ui/mucwin.c
index 8217faf5..c508b676 100644
--- a/src/ui/mucwin.c
+++ b/src/ui/mucwin.c
@@ -725,13 +725,13 @@ mucwin_affiliation_set_error(ProfMucWin *mucwin, const char *const jid, const ch
 }
 
 void
-mucwin_role_set_error(const char *const roomjid, const char *const nick, const char *const role,
+mucwin_role_set_error(ProfMucWin *mucwin, const char *const nick, const char *const role,
     const char *const error)
 {
-    ProfWin *window = (ProfWin*)wins_get_muc(roomjid);
-    if (window) {
-        win_vprint(window, '!', 0, NULL, 0, THEME_ERROR, "", "Error setting %s role for %s: %s", role, nick, error);
-    }
+    assert(mucwin != NULL);
+
+    ProfWin *window = (ProfWin*)mucwin;
+    win_vprint(window, '!', 0, NULL, 0, THEME_ERROR, "", "Error setting %s role for %s: %s", role, nick, error);
 }
 
 void
diff --git a/src/ui/ui.h b/src/ui/ui.h
index 351998c3..a483bc81 100644
--- a/src/ui/ui.h
+++ b/src/ui/ui.h
@@ -201,8 +201,7 @@ void mucwin_affiliation_list_error(ProfMucWin *mucwin, const char *const affilia
 void mucwin_handle_affiliation_list(ProfMucWin *mucwin, const char *const affiliation, GSList *jids);
 void mucwin_affiliation_set_error(ProfMucWin *mucwin, const char *const jid, const char *const affiliation,
     const char *const error);
-void mucwin_role_set_error(const char *const roomjid, const char *const nick, const char *const role,
-    const char *const error);
+void mucwin_role_set_error(ProfMucWin *mucwin, const char *const nick, const char *const role, const char *const error);
 void mucwin_role_list_error(ProfMucWin *mucwin, const char *const role, const char *const error);
 void mucwin_handle_role_list(ProfMucWin *mucwin, const char *const role, GSList *nicks);
 void mucwin_kick_error(ProfMucWin *mucwin, const char *const nick, const char *const error);
diff --git a/src/xmpp/iq.c b/src/xmpp/iq.c
index 9d0763df..252dcd71 100644
--- a/src/xmpp/iq.c
+++ b/src/xmpp/iq.c
@@ -1317,7 +1317,10 @@ _room_role_set_result_handler(xmpp_conn_t *const conn, xmpp_stanza_t *const stan
     if (g_strcmp0(type, STANZA_TYPE_ERROR) == 0) {
         char *error_message = stanza_get_error_message(stanza);
         log_debug("Error setting role %s list for room %s, user %s: %s", role_set->privilege, from, role_set->item, error_message);
-        mucwin_role_set_error(from, role_set->item, role_set->privilege, error_message);
+        ProfMucWin *mucwin = wins_get_muc(from);
+        if (mucwin) {
+            mucwin_role_set_error(mucwin, role_set->item, role_set->privilege, error_message);
+        }
         free(error_message);
     }
 
diff --git a/tests/unittests/ui/stub_ui.c b/tests/unittests/ui/stub_ui.c
index 2dc55567..77887a97 100644
--- a/tests/unittests/ui/stub_ui.c
+++ b/tests/unittests/ui/stub_ui.c
@@ -275,7 +275,7 @@ void mucwin_affiliation_list_error(ProfMucWin *mucwin, const char * const affili
 void mucwin_handle_affiliation_list(ProfMucWin *mucwin, const char * const affiliation, GSList *jids) {}
 void mucwin_affiliation_set_error(ProfMucWin *mucwin, const char * const jid, const char * const affiliation,
     const char * const error) {}
-void mucwin_role_set_error(const char * const roomjid, const char * const nick, const char * const role,
+void mucwin_role_set_error(ProfMucWin *mucwin, const char * const nick, const char * const role,
     const char * const error) {}
 void mucwin_role_list_error(ProfMucWin *mucwin, const char * const role, const char * const error) {}
 void mucwin_handle_role_list(ProfMucWin *mucwin, const char * const role, GSList *nicks) {}