diff --git a/arch/z80/src/ez80/ez80_emac.c b/arch/z80/src/ez80/ez80_emac.c
index a8db36a679..f347521c2a 100644
--- a/arch/z80/src/ez80/ez80_emac.c
+++ b/arch/z80/src/ez80/ez80_emac.c
@@ -1822,8 +1822,8 @@ static int ez80emac_addmac(struct uip_driver_s *dev, FAR const uint8_t *mac)
   FAR struct ez80emac_driver_s *priv = (FAR struct ez80emac_driver_s *)dev->d_private;
 
   /* Add the MAC address to the hardware multicast routing table */
+  /* MISSING LOGIC!!! */
 
-#warning "Multicast MAC support not implemented"
   return OK;
 }
 #endif
@@ -1852,8 +1852,8 @@ static int ez80emac_rmmac(struct uip_driver_s *dev, FAR const uint8_t *mac)
   FAR struct ez80emac_driver_s *priv = (FAR struct ez80emac_driver_s *)dev->d_private;
 
   /* Add the MAC address to the hardware multicast routing table */
+  /* MISSING LOGIC!!! */
 
-#warning "Multicast MAC support not implemented"
   return OK;
 }
 #endif
diff --git a/arch/z80/src/ez80/ez80_spi.c b/arch/z80/src/ez80/ez80_spi.c
index 22cfd789c3..d701d55484 100755
--- a/arch/z80/src/ez80/ez80_spi.c
+++ b/arch/z80/src/ez80/ez80_spi.c
@@ -41,6 +41,7 @@
 
 #include <sys/types.h>
 #include <stdint.h>
+#include <errno.h>
 
 #include <arch/board/board.h>
 #include <nuttx/arch.h>