diff --git a/eo/src/utils/checkpointing b/eo/src/utils/checkpointing
index 465c29fbf..698f4c11f 100644
--- a/eo/src/utils/checkpointing
+++ b/eo/src/utils/checkpointing
@@ -4,5 +4,6 @@
 #include <utils/eoMonitor.h>
 #include <utils/eoFileMonitor.h>
 #include <utils/eoStdoutMonitor.h>
+#include <utils/eoGnuplot1DMonitor.h>
 #include <utils/eoCheckPoint.h>
 #include <utils/eoStat.h>