diff --git a/firmware/debug.c b/firmware/debug.c
index 6a30c6076a..38823107e3 100644
--- a/firmware/debug.c
+++ b/firmware/debug.c
@@ -33,6 +33,7 @@ static char debugbuf[200];
 
 void debug_init(void)
 {
+#if CONFIG_CPU == SH7034
     /* Clear it all! */
     SSR1 &= ~(SCI_RDRF | SCI_ORER | SCI_PER | SCI_FER);
 
@@ -41,6 +42,7 @@ void debug_init(void)
     SCR1 |= 0x40;
     SCR1 &= ~0x80;
     IPRE |= 0xf000; /* Set to highest priority */
+#endif
 }
 
 #ifdef DEBUG