diff --git a/src/common/logging/clap.cpp b/src/common/logging/clap.cpp
index f5f13ef6..31c8faa7 100644
--- a/src/common/logging/clap.cpp
+++ b/src/common/logging/clap.cpp
@@ -151,6 +151,7 @@ bool ClapLogger::log_request(
                 << ": clap_plugin_gui::is_api_supported(api = ";
         switch (request.api) {
             case clap::ext::gui::ApiType::X11:
+            default:
                 message << request.instance_id << "\"" << CLAP_WINDOW_API_X11
                         << "\" (will be translated to \""
                         << CLAP_WINDOW_API_WIN32 << "\")";
@@ -167,6 +168,7 @@ bool ClapLogger::log_request(bool is_host_plugin,
         message << request.instance_id << ": clap_plugin_gui::create(api = ";
         switch (request.api) {
             case clap::ext::gui::ApiType::X11:
+            default:
                 message << request.instance_id << "\"" << CLAP_WINDOW_API_X11
                         << "\" (will be translated to \""
                         << CLAP_WINDOW_API_WIN32 << "\")";
diff --git a/src/wine-host/bridges/clap.cpp b/src/wine-host/bridges/clap.cpp
index 946d7e0e..32584bf7 100644
--- a/src/wine-host/bridges/clap.cpp
+++ b/src/wine-host/bridges/clap.cpp
@@ -368,6 +368,7 @@ void ClapBridge::run() {
                         // when the plugin opens its own Wine window.
                         switch (request.api) {
                             case clap::ext::gui::ApiType::X11:
+                            default:
                                 return gui->is_api_supported(
                                     plugin, CLAP_WINDOW_API_WIN32,
                                     request.is_floating);
@@ -389,6 +390,7 @@ void ClapBridge::run() {
                         // and `is_floating` will always be `false`.
                         switch (request.api) {
                             case clap::ext::gui::ApiType::X11:
+                            default:
                                 return gui->create(plugin,
                                                    CLAP_WINDOW_API_WIN32,
                                                    request.is_floating);