diff --git a/hw/pcnet.c b/hw/pcnet.c
index b52935a..49ff321 100644
--- a/hw/pcnet.c
+++ b/hw/pcnet.c
@@ -1615,6 +1615,18 @@ static uint32_t pcnet_aprom_readb(void *opaque,
uint32_t addr)
     return val;
 }

+static IOPortWriteFunc * const pcnet_aprom_writes[] = {
+    pcnet_aprom_writeb,
+    NULL,
+    NULL,
+};
+
+static IOPortReadFunc * const pcnet_aprom_reads[] = {
+    pcnet_aprom_readb,
+    NULL,
+    NULL,
+};
+
 void pcnet_ioport_writew(void *opaque, uint32_t addr, uint32_t val)
 {