diff --git a/src/openrct2/config/Config.cpp b/src/openrct2/config/Config.cpp
index f7634fe0c7..89b11af5fd 100644
--- a/src/openrct2/config/Config.cpp
+++ b/src/openrct2/config/Config.cpp
@@ -25,8 +25,8 @@
 #include "../network/network.h"
 #include "../OpenRCT2.h"
 #include "Config.h"
-#include "IniReader.h"
-#include "IniWriter.h"
+#include "IniReader.hpp"
+#include "IniWriter.hpp"
 
 extern "C"
 {
diff --git a/src/openrct2/config/ConfigEnum.h b/src/openrct2/config/ConfigEnum.hpp
similarity index 100%
rename from src/openrct2/config/ConfigEnum.h
rename to src/openrct2/config/ConfigEnum.hpp
diff --git a/src/openrct2/config/IniReader.cpp b/src/openrct2/config/IniReader.cpp
index d203650f01..d732d25c47 100644
--- a/src/openrct2/config/IniReader.cpp
+++ b/src/openrct2/config/IniReader.cpp
@@ -23,7 +23,7 @@
 #include "../core/FileStream.hpp"
 #include "../core/String.hpp"
 #include "../core/StringBuilder.hpp"
-#include "IniReader.h"
+#include "IniReader.hpp"
 
 struct Span
 {
diff --git a/src/openrct2/config/IniReader.h b/src/openrct2/config/IniReader.hpp
similarity index 98%
rename from src/openrct2/config/IniReader.h
rename to src/openrct2/config/IniReader.hpp
index 9a2cf66d06..3b8df92550 100644
--- a/src/openrct2/config/IniReader.h
+++ b/src/openrct2/config/IniReader.hpp
@@ -16,7 +16,7 @@
 
 #include <string>
 #include "../common.h"
-#include "ConfigEnum.h"
+#include "ConfigEnum.hpp"
 
 interface IIniReader
 {
diff --git a/src/openrct2/config/IniWriter.cpp b/src/openrct2/config/IniWriter.cpp
index 57451e61a0..bad2ca1a88 100644
--- a/src/openrct2/config/IniWriter.cpp
+++ b/src/openrct2/config/IniWriter.cpp
@@ -17,7 +17,7 @@
 #include <sstream>
 #include "../core/FileStream.hpp"
 #include "../platform/platform.h"
-#include "IniWriter.h"
+#include "IniWriter.hpp"
 
 class IniWriter final : public IIniWriter
 {
diff --git a/src/openrct2/config/IniWriter.h b/src/openrct2/config/IniWriter.hpp
similarity index 98%
rename from src/openrct2/config/IniWriter.h
rename to src/openrct2/config/IniWriter.hpp
index be409f32ed..a323a91360 100644
--- a/src/openrct2/config/IniWriter.h
+++ b/src/openrct2/config/IniWriter.hpp
@@ -16,7 +16,7 @@
 
 #include <string>
 #include "../common.h"
-#include "ConfigEnum.h"
+#include "ConfigEnum.hpp"
 
 interface IIniWriter
 {
diff --git a/src/openrct2/libopenrct2.vcxproj b/src/openrct2/libopenrct2.vcxproj
index e16cd20dc9..1ae212c74d 100644
--- a/src/openrct2/libopenrct2.vcxproj
+++ b/src/openrct2/libopenrct2.vcxproj
@@ -423,9 +423,9 @@
     <ClInclude Include="audio\AudioMixer.h" />
     <ClInclude Include="audio\AudioSource.h" />
     <ClInclude Include="config\Config.h" />
-    <ClInclude Include="config\ConfigEnum.h" />
-    <ClInclude Include="config\IniReader.h" />
-    <ClInclude Include="config\IniWriter.h" />
+    <ClInclude Include="config\ConfigEnum.hpp" />
+    <ClInclude Include="config\IniReader.hpp" />
+    <ClInclude Include="config\IniWriter.hpp" />
     <ClInclude Include="FileClassifier.h" />
     <ClInclude Include="network\ServerList.h" />
     <ClInclude Include="rct12.h" />