diff --git a/bsp/cvitek/c906_little/board/interrupt.c b/bsp/cvitek/c906_little/board/interrupt.c
index 9a6625cf25f..49a23662118 100755
--- a/bsp/cvitek/c906_little/board/interrupt.c
+++ b/bsp/cvitek/c906_little/board/interrupt.c
@@ -63,7 +63,7 @@ void plic_init(void)
 {
     int i;
 
-    for (i = 0; i < IRQ_MAX_NR / 4; i = i + 4)
+    for (i = 0; i < IRQ_MAX_NR * 4; i = i + 4)
     {
         mmio_write_32(((uintptr_t) PLIC_PRIORITY0 + i), 0);
     }