diff --git a/modules/arkit/register_types.h b/modules/arkit/register_types.h
index 5c697baf68..f8939a1e3f 100644
--- a/modules/arkit/register_types.h
+++ b/modules/arkit/register_types.h
@@ -28,5 +28,10 @@
 /* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.                */
 /*************************************************************************/
 
+#ifndef ARKIT_REGISTER_TYPES_H
+#define ARKIT_REGISTER_TYPES_H
+
 void register_arkit_types();
 void unregister_arkit_types();
+
+#endif // ARKIT_REGISTER_TYPES_H
diff --git a/modules/basis_universal/texture_basisu.h b/modules/basis_universal/texture_basisu.h
index 8de151ede0..20ecf15a59 100644
--- a/modules/basis_universal/texture_basisu.h
+++ b/modules/basis_universal/texture_basisu.h
@@ -28,6 +28,9 @@
 /* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.                */
 /*************************************************************************/
 
+#ifndef BASIS_UNIVERSAL_TEXTURE_BASISU_H
+#define BASIS_UNIVERSAL_TEXTURE_BASISU_H
+
 #include "scene/resources/texture.h"
 
 #ifdef TOOLS_ENABLED
@@ -75,3 +78,5 @@ public:
 };
 
 #endif
+
+#endif // BASIS_UNIVERSAL_TEXTURE_BASISU_H
diff --git a/modules/camera/register_types.h b/modules/camera/register_types.h
index f2753cb6d7..e34f84bf2c 100644
--- a/modules/camera/register_types.h
+++ b/modules/camera/register_types.h
@@ -28,5 +28,10 @@
 /* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.                */
 /*************************************************************************/
 
+#ifndef CAMERA_REGISTER_TYPES_H
+#define CAMERA_REGISTER_TYPES_H
+
 void register_camera_types();
 void unregister_camera_types();
+
+#endif // CAMERA_REGISTER_TYPES_H
diff --git a/modules/denoise/register_types.h b/modules/denoise/register_types.h
index 2ffc36ee2c..f0f1f44bfe 100644
--- a/modules/denoise/register_types.h
+++ b/modules/denoise/register_types.h
@@ -28,5 +28,10 @@
 /* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.                */
 /*************************************************************************/
 
+#ifndef DENOISE_REGISTER_TYPES_H
+#define DENOISE_REGISTER_TYPES_H
+
 void register_denoise_types();
 void unregister_denoise_types();
+
+#endif // DENOISE_REGISTER_TYPES_H
diff --git a/modules/mono/register_types.h b/modules/mono/register_types.h
index 7fd0d24eb0..e30d9a8abd 100644
--- a/modules/mono/register_types.h
+++ b/modules/mono/register_types.h
@@ -28,5 +28,10 @@
 /* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.                */
 /*************************************************************************/
 
+#ifndef MONO_REGISTER_TYPES_H
+#define MONO_REGISTER_TYPES_H
+
 void register_mono_types();
 void unregister_mono_types();
+
+#endif // MONO_REGISTER_TYPES_H
diff --git a/modules/webrtc/webrtc_data_channel_js.h b/modules/webrtc/webrtc_data_channel_js.h
index 455866cbf1..7545910e66 100644
--- a/modules/webrtc/webrtc_data_channel_js.h
+++ b/modules/webrtc/webrtc_data_channel_js.h
@@ -28,11 +28,11 @@
 /* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.                */
 /*************************************************************************/
 
-#ifdef JAVASCRIPT_ENABLED
-
 #ifndef WEBRTC_DATA_CHANNEL_JS_H
 #define WEBRTC_DATA_CHANNEL_JS_H
 
+#ifdef JAVASCRIPT_ENABLED
+
 #include "webrtc_data_channel.h"
 
 class WebRTCDataChannelJS : public WebRTCDataChannel {
@@ -88,6 +88,6 @@ public:
 	~WebRTCDataChannelJS();
 };
 
-#endif // WEBRTC_DATA_CHANNEL_JS_H
-
 #endif // JAVASCRIPT_ENABLED
+
+#endif // WEBRTC_DATA_CHANNEL_JS_H
diff --git a/modules/webrtc/webrtc_multiplayer.h b/modules/webrtc/webrtc_multiplayer.h
index bfdcf6daa1..fb37bd7722 100644
--- a/modules/webrtc/webrtc_multiplayer.h
+++ b/modules/webrtc/webrtc_multiplayer.h
@@ -112,4 +112,4 @@ public:
 	ConnectionStatus get_connection_status() const override;
 };
 
-#endif
+#endif // WEBRTC_MULTIPLAYER_H