diff --git a/target/linux/ifxmips/files/include/asm-mips/ifxmips/ifxmips_irq.h b/target/linux/ifxmips/files/include/asm-mips/ifxmips/ifxmips_irq.h
index 30e75974b..8b2bae675 100644
--- a/target/linux/ifxmips/files/include/asm-mips/ifxmips/ifxmips_irq.h
+++ b/target/linux/ifxmips/files/include/asm-mips/ifxmips/ifxmips_irq.h
@@ -39,6 +39,7 @@
 #define IFXMIPS_MEI_INT			(INT_NUM_IM1_IRL0 + 23)
 
 #define IFXMIPS_TIMER6_INT		(INT_NUM_IM1_IRL0 + 23)
+#define IFXMIPS_USB_OC_INT		(INT_NUM_IM4_IRL0 + 23)
 
 #define MIPS_CPU_TIMER_IRQ		7