diff --git a/hw/mips_malta.c b/hw/mips_malta.c
index 0571d58908b6fa5d47a9eb88cc4e8656d4e11e75..4d2464a02cc2a1f4b3cbef894d6df290dd1fb410 100644
--- a/hw/mips_malta.c
+++ b/hw/mips_malta.c
@@ -861,7 +861,8 @@ void mips_malta_init(QEMUMachineInitArgs *args)
     be = 0;
 #endif
     /* FPGA */
-    malta_fpga_init(system_memory, FPGA_ADDRESS, env->irq[2], serial_hds[2]);
+    /* The CBUS UART is attached to the MIPS CPU INT2 pin, ie interrupt 4 */
+    malta_fpga_init(system_memory, FPGA_ADDRESS, env->irq[4], serial_hds[2]);
 
     /* Load firmware in flash / BIOS. */
     dinfo = drive_get(IF_PFLASH, 0, fl_idx);