diff --git a/server/TracyEvent.hpp b/server/TracyEvent.hpp
index 44e50666..9b1c73bd 100644
--- a/server/TracyEvent.hpp
+++ b/server/TracyEvent.hpp
@@ -60,6 +60,7 @@ public:
     {
         uint32_t idx = 0;
         memcpy( &idx, m_idx, 3 );
+        assert( idx != 0 );
         return idx - 1;
     }