diff --git a/zone/aggro.cpp b/zone/aggro.cpp
index dad9aacc4..b568d11af 100644
--- a/zone/aggro.cpp
+++ b/zone/aggro.cpp
@@ -32,6 +32,7 @@
 #endif
 
 #include "map.h"
+#include "water_map.h"
 
 extern Zone* zone;
 //#define LOSDEBUG 6