diff --git a/src/actions/heal.cpp b/src/actions/heal.cpp
index 9be60070760e..4e4c04aca092 100644
--- a/src/actions/heal.cpp
+++ b/src/actions/heal.cpp
@@ -29,6 +29,7 @@
 #include "units/abilities.hpp"
 #include "units/udisplay.hpp"
 #include "units/map.hpp"
+#include "units/unit.hpp"
 
 #include <list>
 #include <vector>