diff --git a/src/PSUEvent.cpp b/src/PSUEvent.cpp
index 3e8c589..8c12c5b 100644
--- a/src/PSUEvent.cpp
+++ b/src/PSUEvent.cpp
@@ -333,6 +333,8 @@
     }
     else
     {
+        std::cerr << "PSUSubEvent asserted by " << path << "\n";
+
         if ((*assertState == false) && ((*asserts).empty()))
         {
             *assertState = true;