diff --git a/include/ddr_spd.h b/include/ddr_spd.h
index 710e528..e895d61 100644
--- a/include/ddr_spd.h
+++ b/include/ddr_spd.h
@@ -304,14 +304,24 @@
 #define SPD_MEMTYPE_DDR2_FBDIMM_PROBE	(0x0A)
 #define SPD_MEMTYPE_DDR3	(0x0B)
 
-/*
- * Byte 3 Key Byte / Module Type for DDR3 SPD
- */
-#define SPD_MODULETYPE_RDIMM		(0x01)
-#define SPD_MODULETYPE_UDIMM		(0x02)
-#define SPD_MODULETYPE_SODIMM		(0x03)
-#define SPD_MODULETYPE_MICRODIMM	(0x04)
-#define SPD_MODULETYPE_MINIRDIMM	(0x05)
-#define SPD_MODULETYPE_MINIUDIMM	(0x06)
+/* DIMM Type for DDR2 SPD (according to v1.3) */
+#define DDR2_SPD_DIMMTYPE_UNDEFINED	(0x00)
+#define DDR2_SPD_DIMMTYPE_RDIMM		(0x01)
+#define DDR2_SPD_DIMMTYPE_UDIMM		(0x02)
+#define DDR2_SPD_DIMMTYPE_SO_DIMM	(0x04)
+#define DDR2_SPD_DIMMTYPE_72B_SO_CDIMM	(0x06)
+#define DDR2_SPD_DIMMTYPE_72B_SO_RDIMM	(0x07)
+#define DDR2_SPD_DIMMTYPE_MICRO_DIMM	(0x08)
+#define DDR2_SPD_DIMMTYPE_MINI_RDIMM	(0x10)
+#define DDR2_SPD_DIMMTYPE_MINI_UDIMM	(0x20)
+
+/* Byte 3 Key Byte / Module Type for DDR3 SPD */
+#define DDR3_SPD_MODULETYPE_MASK	(0x0f)
+#define DDR3_SPD_MODULETYPE_RDIMM	(0x01)
+#define DDR3_SPD_MODULETYPE_UDIMM	(0x02)
+#define DDR3_SPD_MODULETYPE_SO_DIMM	(0x03)
+#define DDR3_SPD_MODULETYPE_MICRO_DIMM	(0x04)
+#define DDR3_SPD_MODULETYPE_MINI_RDIMM	(0x05)
+#define DDR3_SPD_MODULETYPE_MINI_UDIMM	(0x06)
 
 #endif /* _DDR_SPD_H_ */