diff --git a/include/asm-avr32/serial.h b/include/asm-avr32/serial.h
new file mode 100644
index 000000000000..5ecaebc22b02
--- /dev/null
+++ b/include/asm-avr32/serial.h
@@ -0,0 +1,13 @@
+#ifndef _ASM_SERIAL_H
+#define _ASM_SERIAL_H
+
+/*
+ * This assumes you have a 1.8432 MHz clock for your UART.
+ *
+ * It'd be nice if someone built a serial card with a 24.576 MHz
+ * clock, since the 16550A is capable of handling a top speed of 1.5
+ * megabits/second; but this requires the faster clock.
+ */
+#define BASE_BAUD (1843200 / 16)
+
+#endif /* _ASM_SERIAL_H */