diff --git a/src/northbridge/intel/haswell/chip.h b/src/northbridge/intel/haswell/chip.h
index 67ba074f..098bc33 100644
--- a/src/northbridge/intel/haswell/chip.h
+++ b/src/northbridge/intel/haswell/chip.h
@@ -13,6 +13,9 @@
  * GNU General Public License for more details.
  */
 
+#ifndef NORTHBRIDGE_INTEL_HASWELL_CHIP_H
+#define NORTHBRIDGE_INTEL_HASWELL_CHIP_H
+
 #include <drivers/intel/gma/i915.h>
 
 /*
@@ -41,3 +44,5 @@
 };
 
 extern struct chip_operations northbridge_intel_haswell_ops;
+
+#endif /* NORTHBRIDGE_INTEL_HASWELL_CHIP_H */
diff --git a/src/northbridge/intel/haswell/gma.h b/src/northbridge/intel/haswell/gma.h
index baab695..5adab57 100644
--- a/src/northbridge/intel/haswell/gma.h
+++ b/src/northbridge/intel/haswell/gma.h
@@ -13,6 +13,9 @@
  * GNU General Public License for more details.
  */
 
+#ifndef NORTHBRIDGE_INTEL_HASWELL_GMA_H
+#define NORTHBRIDGE_INTEL_HASWELL_GMA_H
+
 /* mailbox 0: header */
 typedef struct {
 	u8	signature[16];
@@ -161,3 +164,5 @@
 } __attribute__((packed)) optionrom_vbt_t;
 
 #define VBT_SIGNATURE 0x54425624
+
+#endif /* NORTHBRIDGE_INTEL_HASWELL_GMA_H */