diff --git a/audio/carla/files/patch-source_utils_CarlaPluginUI.cpp b/audio/carla/files/patch-source_utils_CarlaPluginUI.cpp
new file mode 100644
index 000000000000..ed5dcda5d2a2
--- /dev/null
+++ b/audio/carla/files/patch-source_utils_CarlaPluginUI.cpp
@@ -0,0 +1,13 @@
+- fix build on 12, see https://github.com/falkTX/Carla/issues/1597
+
+--- source/utils/CarlaPluginUI.cpp.orig	2022-03-06 18:03:22 UTC
++++ source/utils/CarlaPluginUI.cpp
+@@ -40,6 +40,8 @@
+ # error CARLA_PLUGIN_UI_CLASS_PREFIX undefined
+ #endif
+ 
++#include <pthread.h>
++
+ // ---------------------------------------------------------------------------------------------------------------------
+ // X11
+