diff --git a/include/i2c.h b/include/i2c.h
index d31c72d2475c48e42f977a63b48e68875620a924..6e6c84531277e7683ac3dc98e05bee929054df06 100644
--- a/include/i2c.h
+++ b/include/i2c.h
@@ -63,6 +63,9 @@
 #if !defined(CFG_DTT_BUS_NUM)
 #define CFG_DTT_BUS_NUM		0
 #endif
+#if !defined(CFG_SPD_BUS_NUM)
+#define CFG_SPD_BUS_NUM		0
+#endif
 
 /*
  * Initialization, must be called once on start up, may be called