diff --git a/src/script_opt/ZAM/IterInfo.h b/src/script_opt/ZAM/IterInfo.h
index 061c680edc..cc2678d235 100644
--- a/src/script_opt/ZAM/IterInfo.h
+++ b/src/script_opt/ZAM/IterInfo.h
@@ -4,6 +4,7 @@
 
 #pragma once
 
+#include "zeek/Dict.h"
 #include "zeek/Val.h"
 #include "zeek/ZeekString.h"
 #include "zeek/script_opt/ZAM/ZInst.h"