diff --git a/UI/frontend-plugins/frontend-tools/captions.cpp b/UI/frontend-plugins/frontend-tools/captions.cpp
index 590d03869..7138ca429 100644
--- a/UI/frontend-plugins/frontend-tools/captions.cpp
+++ b/UI/frontend-plugins/frontend-tools/captions.cpp
@@ -338,6 +338,7 @@ try {
 } catch (HRError err) {
 	error("%s failed: %s (%lX)", __FUNCTION__, err.str, err.hr);
 	CoUninitialize();
+	captions->th.detach();
 }
 
 void obs_captions::start()