diff --git a/GaudiAlg/include/GaudiAlg/HistoID.h b/GaudiAlg/include/GaudiAlg/HistoID.h
index ee9836b1d86f8542cc99dfacfde1b8444e2c22f0..0e7167d75bca58784a5f6c6c6c08d7666dbd4f57 100644
--- a/GaudiAlg/include/GaudiAlg/HistoID.h
+++ b/GaudiAlg/include/GaudiAlg/HistoID.h
@@ -17,6 +17,7 @@
 // ============================================================================
 #include "GaudiAlg/GaudiAlg.h"
 #include "GaudiAlg/GaudiHistoID.h"
+#include <vector>
 // ============================================================================
 
 // ============================================================================