diff --git a/src/map/tax.cpp b/src/map/tax.cpp
index 60cdbd4978..0866fd31b6 100644
--- a/src/map/tax.cpp
+++ b/src/map/tax.cpp
@@ -7,9 +7,9 @@
 #include <string.h>
 #include <yaml-cpp/yaml.h>
 
-#include "../common/cbasetypes.h"
-#include "../common/nullpo.h"
-#include "../common/showmsg.h"
+#include "../common/cbasetypes.hpp"
+#include "../common/nullpo.hpp"
+#include "../common/showmsg.hpp"
 
 #include "battle.hpp"
 #include "buyingstore.hpp"
diff --git a/src/map/tax.hpp b/src/map/tax.hpp
index 957e843dd3..273e22faee 100644
--- a/src/map/tax.hpp
+++ b/src/map/tax.hpp
@@ -7,7 +7,7 @@
 #include <string>
 #include <vector>
 
-#include "../common/cbasetypes.h"
+#include "../common/cbasetypes.hpp"
 
 #pragma once