diff --git a/include/asm-m68k/atari_stdma.h b/include/asm-m68k/atari_stdma.h
index a6986af..8e389b7 100644
--- a/include/asm-m68k/atari_stdma.h
+++ b/include/asm-m68k/atari_stdma.h
@@ -8,7 +8,7 @@
 
 /***************************** Prototypes *****************************/
 
-void stdma_lock(irqreturn_t (*handler)(int, void *), void *data);
+void stdma_lock(irq_handler_t handler, void *data);
 void stdma_release( void );
 int stdma_others_waiting( void );
 int stdma_islocked( void );