diff --git a/src/vendorcode/amd/cimx/sb700/OEM.h b/src/vendorcode/amd/cimx/sb700/OEM.h
index 74604c0280..51a829694d 100644
--- a/src/vendorcode/amd/cimx/sb700/OEM.h
+++ b/src/vendorcode/amd/cimx/sb700/OEM.h
@@ -29,8 +29,12 @@
 #ifndef _AMD_SB_CIMx_OEM_H_
 #define _AMD_SB_CIMx_OEM_H_
 
-#define BIOS_SIZE					0x04	//04 - 1MB
-#define	LEGACY_FREE					0x00
+#ifndef BIOS_SIZE
+	#define BIOS_SIZE					0x04	//04 - 1MB
+#endif
+#ifndef LEGACY_FREE
+	#define	LEGACY_FREE					0x00
+#endif
 
 /**
  * PCIEX_BASE_ADDRESS - Define PCIE base address
diff --git a/src/vendorcode/amd/cimx/sb800/OEM.h b/src/vendorcode/amd/cimx/sb800/OEM.h
index b38acba524..c2d8670e0c 100644
--- a/src/vendorcode/amd/cimx/sb800/OEM.h
+++ b/src/vendorcode/amd/cimx/sb800/OEM.h
@@ -33,7 +33,9 @@
 #ifndef BIOS_SIZE
   #define BIOS_SIZE                      0x04   //04 - 1MB
 #endif
-#define LEGACY_FREE                    0x00
+#ifndef LEGACY_FREE
+	#define LEGACY_FREE                    0x00
+#endif
 //#define ACPI_SLEEP_TRAP                0x01
 //#define SPREAD_SPECTRUM_EPROM_LOAD     0x01
 
diff --git a/src/vendorcode/amd/cimx/sb900/Oem.h b/src/vendorcode/amd/cimx/sb900/Oem.h
old mode 100644
new mode 100755
index 14bc530ed7..f374b30a02
--- a/src/vendorcode/amd/cimx/sb900/Oem.h
+++ b/src/vendorcode/amd/cimx/sb900/Oem.h
@@ -30,7 +30,9 @@
 #ifndef BIOS_SIZE
   #define BIOS_SIZE                      0x04   //04 - 1MB
 #endif
-#define LEGACY_FREE                    0x00
+#ifndef LEGACY_FREE
+	#define LEGACY_FREE                    0x00
+#endif
 #define ACPI_SLEEP_TRAP                0x01
 //#define SPREAD_SPECTRUM_EPROM_LOAD     0x01