diff --git a/arch/h8300/include/asm/ptrace.h b/arch/h8300/include/asm/ptrace.h
index 313cafa853807866927bbf7f0a792e521f4b3fd6..66d383848ff1f2a7a27095b4764e0be075cb95c8 100644
--- a/arch/h8300/include/asm/ptrace.h
+++ b/arch/h8300/include/asm/ptrace.h
@@ -4,6 +4,8 @@
 
 #include <uapi/asm/ptrace.h>
 
+struct task_struct;
+
 #ifndef __ASSEMBLY__
 #ifndef PS_S
 #define PS_S  (0x10)