diff --git a/components/fx/lexer.hpp b/components/fx/lexer.hpp
index adc8974904..dda6b3a0f6 100644
--- a/components/fx/lexer.hpp
+++ b/components/fx/lexer.hpp
@@ -1,5 +1,5 @@
-#ifndef OPENMW_COMPONENTS_FX_LEXER_H
-#define OPENMW_COMPONENTS_FX_LEXER_H
+#ifndef OPENMW_COMPONENTS_FX_LEXER_HPP
+#define OPENMW_COMPONENTS_FX_LEXER_HPP
 
 #include <cstddef>
 #include <optional>
diff --git a/components/fx/lexertypes.hpp b/components/fx/lexertypes.hpp
index c0df1a9da8..2a56a84a1a 100644
--- a/components/fx/lexertypes.hpp
+++ b/components/fx/lexertypes.hpp
@@ -1,5 +1,5 @@
-#ifndef OPENMW_COMPONENTS_FX_LEXERTYPES_H
-#define OPENMW_COMPONENTS_FX_LEXERTYPES_H
+#ifndef OPENMW_COMPONENTS_FX_LEXERTYPES_HPP
+#define OPENMW_COMPONENTS_FX_LEXERTYPES_HPP
 
 #include <string_view>
 #include <variant>
diff --git a/components/fx/parseconstants.hpp b/components/fx/parseconstants.hpp
index 412a19980b..3ad9abd959 100644
--- a/components/fx/parseconstants.hpp
+++ b/components/fx/parseconstants.hpp
@@ -1,5 +1,5 @@
-#ifndef OPENMW_COMPONENTS_FX_PARSECONSTANTS_H
-#define OPENMW_COMPONENTS_FX_PARSECONSTANTS_H
+#ifndef OPENMW_COMPONENTS_FX_PARSECONSTANTS_HPP
+#define OPENMW_COMPONENTS_FX_PARSECONSTANTS_HPP
 
 #include <array>
 #include <string_view>
diff --git a/components/fx/pass.hpp b/components/fx/pass.hpp
index e176afc699..1c417ac8cf 100644
--- a/components/fx/pass.hpp
+++ b/components/fx/pass.hpp
@@ -1,5 +1,5 @@
-#ifndef OPENMW_COMPONENTS_FX_PASS_H
-#define OPENMW_COMPONENTS_FX_PASS_H
+#ifndef OPENMW_COMPONENTS_FX_PASS_HPP
+#define OPENMW_COMPONENTS_FX_PASS_HPP
 
 #include <array>
 #include <optional>
diff --git a/components/fx/technique.hpp b/components/fx/technique.hpp
index 2778763a9a..ad5e876faa 100644
--- a/components/fx/technique.hpp
+++ b/components/fx/technique.hpp
@@ -1,5 +1,5 @@
-#ifndef OPENMW_COMPONENTS_FX_TECHNIQUE_H
-#define OPENMW_COMPONENTS_FX_TECHNIQUE_H
+#ifndef OPENMW_COMPONENTS_FX_TECHNIQUE_HPP
+#define OPENMW_COMPONENTS_FX_TECHNIQUE_HPP
 
 #include <filesystem>
 #include <memory>
diff --git a/components/fx/types.hpp b/components/fx/types.hpp
index 596b54c217..1536cda115 100644
--- a/components/fx/types.hpp
+++ b/components/fx/types.hpp
@@ -1,5 +1,5 @@
-#ifndef OPENMW_COMPONENTS_FX_TYPES_H
-#define OPENMW_COMPONENTS_FX_TYPES_H
+#ifndef OPENMW_COMPONENTS_FX_TYPES_HPP
+#define OPENMW_COMPONENTS_FX_TYPES_HPP
 
 #include <optional>
 #include <variant>
diff --git a/components/fx/widgets.hpp b/components/fx/widgets.hpp
index 6217af7fee..59787ed9aa 100644
--- a/components/fx/widgets.hpp
+++ b/components/fx/widgets.hpp
@@ -1,5 +1,5 @@
-#ifndef OPENMW_COMPONENTS_FX_WIDGETS_H
-#define OPENMW_COMPONENTS_FX_WIDGETS_H
+#ifndef OPENMW_COMPONENTS_FX_WIDGETS_HPP
+#define OPENMW_COMPONENTS_FX_WIDGETS_HPP
 
 #include <MyGUI_Button.h>
 #include <MyGUI_Delegate.h>