diff --git a/include/asm-m68k/signal.h b/include/asm-m68k/signal.h
index de1ba6ead3b4..3db8a81942f1 100644
--- a/include/asm-m68k/signal.h
+++ b/include/asm-m68k/signal.h
@@ -198,6 +198,7 @@ static inline int sigfindinword(unsigned long word)
 	return word ^ 31;
 }
 
+struct pt_regs;
 extern void ptrace_signal_deliver(struct pt_regs *regs, void *cookie);
 
 #endif /* __KERNEL__ */