diff --git a/src/environment.cpp b/src/environment.cpp
index 9390101e7..571980498 100644
--- a/src/environment.cpp
+++ b/src/environment.cpp
@@ -42,6 +42,7 @@ with this program; if not, write to the Free Software Foundation, Inc.,
 #include "localplayer.h"
 #endif
 #include "daynightratio.h"
+#include "map.h"
 
 #define PP(x) "("<<(x).X<<","<<(x).Y<<","<<(x).Z<<")"