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-rw-r--r--include/hw/char/serial.h3
1 files changed, 3 insertions, 0 deletions
diff --git a/include/hw/char/serial.h b/include/hw/char/serial.h
index c4daf11a14..0acfbbc382 100644
--- a/include/hw/char/serial.h
+++ b/include/hw/char/serial.h
@@ -95,6 +95,9 @@ SerialState *serial_mm_init(MemoryRegion *address_space,
Chardev *chr, enum device_endian end);
/* serial-isa.c */
+
+#define MAX_ISA_SERIAL_PORTS 4
+
#define TYPE_ISA_SERIAL "isa-serial"
void serial_hds_isa_init(ISABus *bus, int from, int to);