diff --git a/board/reef_it8320/board.h b/board/reef_it8320/board.h
index fb308a0cca..dde27dcfcd 100644
--- a/board/reef_it8320/board.h
+++ b/board/reef_it8320/board.h
@@ -143,6 +143,7 @@
 
 /* TODO: There isn't enough space on flash before nds32 toolchain is updated */
 #undef CONFIG_CMD_HASH
+#undef CONFIG_CMD_I2C_XFER
 #undef CONFIG_CMD_IDLE_STATS
 #undef CONFIG_CMD_SLEEPMASK
 #undef CONFIG_CMD_TIMERINFO