diff --git a/c/src/lib/libcpu/arm/mc9328mxl/irq/irq.c b/c/src/lib/libcpu/arm/mc9328mxl/irq/irq.c
index d0d492782d..de7ccd860e 100644
--- a/c/src/lib/libcpu/arm/mc9328mxl/irq/irq.c
+++ b/c/src/lib/libcpu/arm/mc9328mxl/irq/irq.c
@@ -21,7 +21,8 @@
 
 void bsp_interrupt_dispatch(void)
 {
-  rtems_vector_number vector = *((uint32_t *) 0x00223040) >> 16;
+
+  rtems_vector_number vector = MC9328MXL_AITC_NIVECSR >> 16;
 
   bsp_interrupt_handler_dispatch(vector);
 }