diff --git a/src/southbridge/intel/i82801gx/nvs.h b/src/southbridge/intel/i82801gx/nvs.h
index 6b697f224e..3f44330e5d 100644
--- a/src/southbridge/intel/i82801gx/nvs.h
+++ b/src/southbridge/intel/i82801gx/nvs.h
@@ -1,5 +1,7 @@
 /* SPDX-License-Identifier: GPL-2.0-only */
 
+#ifndef SOUTHBRIDGE_INTEL_I82801GX_NVS_H
+#define SOUTHBRIDGE_INTEL_I82801GX_NVS_H
 #include <stdint.h>
 
 typedef struct {
@@ -97,3 +99,5 @@ typedef struct {
 } __packed global_nvs_t;
 
 void acpi_create_gnvs(global_nvs_t *gnvs);
+
+#endif /* SOUTHBRIDGE_INTEL_I82801GX_NVS_H */
diff --git a/src/southbridge/intel/i82801jx/nvs.h b/src/southbridge/intel/i82801jx/nvs.h
index 6b697f224e..c4879189ee 100644
--- a/src/southbridge/intel/i82801jx/nvs.h
+++ b/src/southbridge/intel/i82801jx/nvs.h
@@ -1,5 +1,7 @@
 /* SPDX-License-Identifier: GPL-2.0-only */
 
+#ifndef SOUTHBRIDGE_INTEL_I82801JX_NVS_H
+#define SOUTHBRIDGE_INTEL_I82801JX_NVS_H
 #include <stdint.h>
 
 typedef struct {
@@ -97,3 +99,5 @@ typedef struct {
 } __packed global_nvs_t;
 
 void acpi_create_gnvs(global_nvs_t *gnvs);
+
+#endif /* SOUTHBRIDGE_INTEL_I82801JX_NVS_H */