diff --git a/trunk/bootrom/build/libraries/os/ARM9/os_irqHandler.c b/trunk/bootrom/build/libraries/os/ARM9/os_irqHandler.c
index f817f21..9e5f69d 100644
--- a/trunk/bootrom/build/libraries/os/ARM9/os_irqHandler.c
+++ b/trunk/bootrom/build/libraries/os/ARM9/os_irqHandler.c
@@ -85,10 +85,8 @@ LSYM(1) clz     r0, r1                  // count zero of high bit
         ldr     r1, =osIntrTable
         ldr     r0, [ r1, r0, LSL #2 ]
 
-        adr     lr, irq_return
-        bx      r0      // set return address for thread rescheduling
+        blx     r0      // set return address for thread rescheduling
 
-irq_return
 #ifdef BROM_ENABLE_THREAD
         bl      osIrqHandler_ThreadSwitch
 #endif // BROM_ENABLE_THREAD
diff --git a/trunk/bootrom/build/libraries/os/ARM9/os_interrupt.c b/trunk/bootrom/build/libraries/os/common/os_interrupt.c
similarity index 100%
rename from trunk/bootrom/build/libraries/os/ARM9/os_interrupt.c
rename to trunk/bootrom/build/libraries/os/common/os_interrupt.c