diff --git a/GreenshotPlugin/Controls/PleaseWaitForm.cs b/GreenshotPlugin/Controls/PleaseWaitForm.cs
index e962c7e0f..65a3f0450 100644
--- a/GreenshotPlugin/Controls/PleaseWaitForm.cs
+++ b/GreenshotPlugin/Controls/PleaseWaitForm.cs
@@ -77,6 +77,7 @@ namespace GreenshotPlugin.Controls {
 						try {
 							waitDelegate.Invoke();
 						} catch (Exception ex) {
+							LOG.Error("invoke error:", ex);
 							threadException = ex;
 						}
 					})