Convert '\n' to '\r\n' on debug serial output.
diff --git a/src/output.c b/src/output.c
index dd647a2..6d4767b 100644
--- a/src/output.c
+++ b/src/output.c
@@ -61,9 +61,12 @@
         if (! CONFIG_COREBOOT)
             // Send character to debug port.
             outb(c, PORT_BIOS_DEBUG);
-        if (CONFIG_DEBUG_SERIAL)
+        if (CONFIG_DEBUG_SERIAL) {
             // Send character to serial port.
+            if (c == '\n')
+                debug_serial('\r');
             debug_serial(c);
+        }
     }
 
     if (action) {