diff --git a/include/drivers/partition/gpt.h b/include/drivers/partition/gpt.h
index 3ae160f..d923e95 100644
--- a/include/drivers/partition/gpt.h
+++ b/include/drivers/partition/gpt.h
@@ -10,9 +10,9 @@
 #include <drivers/partition/partition.h>
 
 #define PARTITION_TYPE_GPT		0xee
-#define GPT_HEADER_OFFSET		PARTITION_BLOCK_SIZE
+#define GPT_HEADER_OFFSET		PLAT_PARTITION_BLOCK_SIZE
 #define GPT_ENTRY_OFFSET		(GPT_HEADER_OFFSET +		\
-					 PARTITION_BLOCK_SIZE)
+					 PLAT_PARTITION_BLOCK_SIZE)
 #define GUID_LEN			16
 
 #define GPT_SIGNATURE			"EFI PART"
diff --git a/include/drivers/partition/partition.h b/include/drivers/partition/partition.h
index d94c782..5f64833 100644
--- a/include/drivers/partition/partition.h
+++ b/include/drivers/partition/partition.h
@@ -17,7 +17,15 @@
 
 CASSERT(PLAT_PARTITION_MAX_ENTRIES <= 128, assert_plat_partition_max_entries);
 
-#define PARTITION_BLOCK_SIZE		512
+#if !PLAT_PARTITION_BLOCK_SIZE
+# define PLAT_PARTITION_BLOCK_SIZE	512
+#endif /* PLAT_PARTITION_BLOCK_SIZE */
+
+CASSERT((PLAT_PARTITION_BLOCK_SIZE == 512) ||
+	(PLAT_PARTITION_BLOCK_SIZE == 4096),
+	assert_plat_partition_block_size);
+
+#define LEGACY_PARTITION_BLOCK_SIZE	512
 
 #define EFI_NAMELEN			36