diff --git a/arch/arm/include/asm/traps.h b/arch/arm/include/asm/traps.h
index f90756dc16dc..5b29a6673625 100644
--- a/arch/arm/include/asm/traps.h
+++ b/arch/arm/include/asm/traps.h
@@ -3,6 +3,9 @@
 
 #include <linux/list.h>
 
+struct pt_regs;
+struct task_struct;
+
 struct undef_hook {
 	struct list_head node;
 	u32 instr_mask;