diff --git a/ports/arm/platforms/dm36x/dm36x-io.h b/ports/arm/platforms/dm36x/dm36x-io.h
index 64e0ee7..c3730fa 100644
--- a/ports/arm/platforms/dm36x/dm36x-io.h
+++ b/ports/arm/platforms/dm36x/dm36x-io.h
@@ -319,6 +319,7 @@
 #define DM36X_PSC_MDSTAT_BASE   0x800
 #define DM36X_PSC_MDCTL_BASE    0xA00
 #define DM36X_PSC_MOD_SPI1      6
+#define DM36X_PSC_MOD_MCBSP     8
 #define DM36X_PSC_MOD_SPI2      11
 #define DM36X_PSC_MOD_I2C       18
 #define DM36X_PSC_MOD_SPI0      22