diff --git a/include/sys/amd64/hw/rs232.h b/include/sys/amd64/hw/rs232.h
index 2b1591d..8588ee0 100644
--- a/include/sys/amd64/hw/rs232.h
+++ b/include/sys/amd64/hw/rs232.h
@@ -1,7 +1,7 @@
 #pragma once
 #include <stdint.h>
 
-#define RS232_COM0  0x3F8
+#define RS232_COM1  0x3F8
 
 void rs232_init(uint16_t port);
 void rs232_send(uint16_t port, char c);
diff --git a/sys/amd64/hw/rs232.c b/sys/amd64/hw/rs232.c
index dee6ef5..a52729c 100644
--- a/sys/amd64/hw/rs232.c
+++ b/sys/amd64/hw/rs232.c
@@ -36,12 +36,12 @@ static int rs232_irq(void) {
     int has_data = 0;
     uint8_t s;
 
-    while ((s = inb(RS232_COM0 + RS232_LSR)) & RS232_LSR_DR) {
+    while ((s = inb(RS232_COM1 + RS232_LSR)) & RS232_LSR_DR) {
         has_data = 1;
-        uint8_t c = inb(RS232_COM0);
+        uint8_t c = inb(RS232_COM1);
 
         // Act as echo for now
-        rs232_send(RS232_COM0, c);
+        rs232_send(RS232_COM1, c);
     }
 
     return !has_data;
diff --git a/sys/amd64/kernel.c b/sys/amd64/kernel.c
index a7bfc15..76a2608 100644
--- a/sys/amd64/kernel.c
+++ b/sys/amd64/kernel.c
@@ -19,7 +19,7 @@ static multiboot_info_t *multiboot_info;
 void kernel_main(struct amd64_loader_data *data) {
     // Reinitialize RS232 properly
     ps2_init();
-    rs232_init(RS232_COM0);
+    rs232_init(RS232_COM1);
 
     data = (struct amd64_loader_data *) MM_VIRTUALIZE(data);
     multiboot_info = (multiboot_info_t *) MM_VIRTUALIZE(data->multiboot_info_ptr);
diff --git a/sys/debug.c b/sys/debug.c
index cc1a41b..d2b777c 100644
--- a/sys/debug.c
+++ b/sys/debug.c
@@ -48,7 +48,7 @@ void fmtsiz(char *out, size_t sz) {
 // TODO: make debugc a __weak function of a character
 void debugc(int level, char c) {
 #if defined(ARCH_AMD64)
-    rs232_send(RS232_COM0, c);
+    rs232_send(RS232_COM1, c);
     amd64_con_putc(c);
 #endif
 }