diff --git a/src/common/container_hash.h b/src/common/container_hash.h
index a5e3577452..b6d8e02e26 100644
--- a/src/common/container_hash.h
+++ b/src/common/container_hash.h
@@ -1,7 +1,12 @@
+// SPDX-FileCopyrightText: Copyright 2026 Eden Emulator Project
+// SPDX-License-Identifier: GPL-3.0-or-later
+
 // SPDX-FileCopyrightText: 2005-2014 Daniel James
 // SPDX-FileCopyrightText: 2016 Austin Appleby
 // SPDX-License-Identifier: BSL-1.0
 
+#pragma once
+
 #include <array>
 #include <climits>
 #include <cstdint>
diff --git a/src/core/arm/dynarmic/arm_dynarmic.h b/src/core/arm/dynarmic/arm_dynarmic.h
index 46384f7e6d..8e6b1d9766 100644
--- a/src/core/arm/dynarmic/arm_dynarmic.h
+++ b/src/core/arm/dynarmic/arm_dynarmic.h
@@ -1,9 +1,11 @@
-// SPDX-FileCopyrightText: Copyright 2025 Eden Emulator Project
+// SPDX-FileCopyrightText: Copyright 2026 Eden Emulator Project
 // SPDX-License-Identifier: GPL-3.0-or-later
 
 // SPDX-FileCopyrightText: Copyright 2023 yuzu Emulator Project
 // SPDX-License-Identifier: GPL-2.0-or-later
 
+#pragma once
+
 #include <dynarmic/interface/halt_reason.h>
 
 #include "core/arm/arm_interface.h"
diff --git a/src/core/arm/nce/instructions.h b/src/core/arm/nce/instructions.h
index ada0da9559..451778df65 100644
--- a/src/core/arm/nce/instructions.h
+++ b/src/core/arm/nce/instructions.h
@@ -1,9 +1,11 @@
-// SPDX-FileCopyrightText: Copyright 2025 Eden Emulator Project
+// SPDX-FileCopyrightText: Copyright 2026 Eden Emulator Project
 // SPDX-License-Identifier: GPL-3.0-or-later
 
 // SPDX-FileCopyrightText: Copyright 2020 Skyline Team and Contributors
 // SPDX-License-Identifier: MPL-2.0
 
+#pragma once
+
 #include "common/bit_field.h"
 #include "common/common_types.h"
 
diff --git a/src/core/hle/kernel/k_typed_address.h b/src/core/hle/kernel/k_typed_address.h
index d57535ba01..d793d67a10 100644
--- a/src/core/hle/kernel/k_typed_address.h
+++ b/src/core/hle/kernel/k_typed_address.h
@@ -1,6 +1,11 @@
+// SPDX-FileCopyrightText: Copyright 2026 Eden Emulator Project
+// SPDX-License-Identifier: GPL-3.0-or-later
+
 // SPDX-FileCopyrightText: Copyright 2023 yuzu Emulator Project
 // SPDX-License-Identifier: GPL-2.0-or-later
 
+#pragma once
+
 #include "common/typed_address.h"
 
 namespace Kernel {
diff --git a/src/core/hle/service/nvnflinger/hos_binder_driver.h b/src/core/hle/service/nvnflinger/hos_binder_driver.h
index b7fb07bd2e..6b551c91d2 100644
--- a/src/core/hle/service/nvnflinger/hos_binder_driver.h
+++ b/src/core/hle/service/nvnflinger/hos_binder_driver.h
@@ -1,6 +1,11 @@
+// SPDX-FileCopyrightText: Copyright 2026 Eden Emulator Project
+// SPDX-License-Identifier: GPL-3.0-or-later
+
 // SPDX-FileCopyrightText: Copyright 2024 yuzu Emulator Project
 // SPDX-License-Identifier: GPL-2.0-or-later
 
+#pragma once
+
 #include "core/hle/service/cmif_types.h"
 #include "core/hle/service/service.h"
 
diff --git a/src/core/hle/service/olsc/daemon_controller.h b/src/core/hle/service/olsc/daemon_controller.h
index fc7dd7bbcb..5f978ab153 100644
--- a/src/core/hle/service/olsc/daemon_controller.h
+++ b/src/core/hle/service/olsc/daemon_controller.h
@@ -4,6 +4,8 @@
 // SPDX-FileCopyrightText: Copyright 2024 yuzu Emulator Project
 // SPDX-License-Identifier: GPL-2.0-or-later
 
+#pragma once
+
 #include <ankerl/unordered_dense.h>
 
 #include "common/uuid.h"
diff --git a/src/core/hle/service/olsc/native_handle_holder.h b/src/core/hle/service/olsc/native_handle_holder.h
index 985c60d1cb..e0eac50c28 100644
--- a/src/core/hle/service/olsc/native_handle_holder.h
+++ b/src/core/hle/service/olsc/native_handle_holder.h
@@ -4,6 +4,8 @@
 // SPDX-FileCopyrightText: Copyright 2024 yuzu Emulator Project
 // SPDX-License-Identifier: GPL-2.0-or-later
 
+#pragma once
+
 #include "core/hle/service/cmif_types.h"
 #include "core/hle/service/service.h"
 
diff --git a/src/core/hle/service/olsc/olsc_service_for_application.h b/src/core/hle/service/olsc/olsc_service_for_application.h
index 3f9ac7536a..8941659478 100644
--- a/src/core/hle/service/olsc/olsc_service_for_application.h
+++ b/src/core/hle/service/olsc/olsc_service_for_application.h
@@ -1,6 +1,11 @@
+// SPDX-FileCopyrightText: Copyright 2026 Eden Emulator Project
+// SPDX-License-Identifier: GPL-3.0-or-later
+
 // SPDX-FileCopyrightText: Copyright 2024 yuzu Emulator Project
 // SPDX-License-Identifier: GPL-2.0-or-later
 
+#pragma once
+
 #include "core/hle/service/cmif_types.h"
 #include "core/hle/service/ns/ns_types.h"
 #include "core/hle/service/service.h"
diff --git a/src/core/hle/service/olsc/olsc_service_for_system_service.h b/src/core/hle/service/olsc/olsc_service_for_system_service.h
index 447e37005e..d16c8b979b 100644
--- a/src/core/hle/service/olsc/olsc_service_for_system_service.h
+++ b/src/core/hle/service/olsc/olsc_service_for_system_service.h
@@ -4,6 +4,8 @@
 // SPDX-FileCopyrightText: Copyright 2024 yuzu Emulator Project
 // SPDX-License-Identifier: GPL-2.0-or-later
 
+#pragma once
+
 #include <array>
 
 #include "common/uuid.h"
diff --git a/src/core/hle/service/olsc/remote_storage_controller.h b/src/core/hle/service/olsc/remote_storage_controller.h
index bae1e8efb5..21b439013a 100644
--- a/src/core/hle/service/olsc/remote_storage_controller.h
+++ b/src/core/hle/service/olsc/remote_storage_controller.h
@@ -4,6 +4,8 @@
 // SPDX-FileCopyrightText: Copyright 2024 yuzu Emulator Project
 // SPDX-License-Identifier: GPL-2.0-or-later
 
+#pragma once
+
 #include "core/hle/service/cmif_types.h"
 #include "core/hle/service/service.h"
 
diff --git a/src/core/hle/service/olsc/transfer_task_list_controller.h b/src/core/hle/service/olsc/transfer_task_list_controller.h
index 72dbf610d8..4ac770b477 100644
--- a/src/core/hle/service/olsc/transfer_task_list_controller.h
+++ b/src/core/hle/service/olsc/transfer_task_list_controller.h
@@ -4,6 +4,8 @@
 // SPDX-FileCopyrightText: Copyright 2024 yuzu Emulator Project
 // SPDX-License-Identifier: GPL-2.0-or-later
 
+#pragma once
+
 #include "core/hle/service/cmif_types.h"
 #include "core/hle/service/service.h"
 
diff --git a/src/core/hle/service/ro/ro_results.h b/src/core/hle/service/ro/ro_results.h
index 00f05c5a59..906378bc7f 100644
--- a/src/core/hle/service/ro/ro_results.h
+++ b/src/core/hle/service/ro/ro_results.h
@@ -1,6 +1,11 @@
+// SPDX-FileCopyrightText: Copyright 2026 Eden Emulator Project
+// SPDX-License-Identifier: GPL-3.0-or-later
+
 // SPDX-FileCopyrightText: Copyright 2023 yuzu Emulator Project
 // SPDX-License-Identifier: GPL-2.0-or-later
 
+#pragma once
+
 #include "core/hle/result.h"
 
 namespace Service::RO {
diff --git a/src/core/hle/service/ro/ro_types.h b/src/core/hle/service/ro/ro_types.h
index 50b424395a..8e88f43246 100644
--- a/src/core/hle/service/ro/ro_types.h
+++ b/src/core/hle/service/ro/ro_types.h
@@ -4,6 +4,8 @@
 // SPDX-FileCopyrightText: Copyright 2023 yuzu Emulator Project
 // SPDX-License-Identifier: GPL-2.0-or-later
 
+#pragma once
+
 #include "common/assert.h"
 #include "common/common_funcs.h"
 #include "common/common_types.h"
diff --git a/src/core/hle/service/vi/application_display_service.h b/src/core/hle/service/vi/application_display_service.h
index 1bdeb8f845..a2eeb4c70c 100644
--- a/src/core/hle/service/vi/application_display_service.h
+++ b/src/core/hle/service/vi/application_display_service.h
@@ -1,6 +1,11 @@
+// SPDX-FileCopyrightText: Copyright 2026 Eden Emulator Project
+// SPDX-License-Identifier: GPL-3.0-or-later
+
 // SPDX-FileCopyrightText: Copyright 2024 yuzu Emulator Project
 // SPDX-License-Identifier: GPL-2.0-or-later
 
+#pragma once
+
 #include <map>
 #include <set>
 
diff --git a/src/core/hle/service/vi/system_display_service.h b/src/core/hle/service/vi/system_display_service.h
index d6cc8c75f1..a3b88c519d 100644
--- a/src/core/hle/service/vi/system_display_service.h
+++ b/src/core/hle/service/vi/system_display_service.h
@@ -1,9 +1,11 @@
-// SPDX-FileCopyrightText: Copyright 2025 Eden Emulator Project
+// SPDX-FileCopyrightText: Copyright 2026 Eden Emulator Project
 // SPDX-License-Identifier: GPL-3.0-or-later
 
 // SPDX-FileCopyrightText: Copyright 2024 yuzu Emulator Project
 // SPDX-License-Identifier: GPL-2.0-or-later
 
+#pragma once
+
 #include "common/math_util.h"
 #include "core/hle/service/cmif_types.h"
 #include "core/hle/service/nvnflinger/ui/fence.h"
diff --git a/src/dynarmic/src/dynarmic/backend/arm64/emit_arm64_memory.h b/src/dynarmic/src/dynarmic/backend/arm64/emit_arm64_memory.h
index 25608dbfe3..3084f3df4d 100644
--- a/src/dynarmic/src/dynarmic/backend/arm64/emit_arm64_memory.h
+++ b/src/dynarmic/src/dynarmic/backend/arm64/emit_arm64_memory.h
@@ -6,6 +6,7 @@
  * SPDX-License-Identifier: 0BSD
  */
 
+#pragma once
 #include <cstddef>
 
 namespace oaknut {