diff --git a/arch/x86/include/asm/crash.h b/arch/x86/include/asm/crash.h
index a7adb2bfbf0b819b6c4c6c8d8ff97e2d28519a17..6b8ad6fa3979a12af9c84c4516caeba977a1d8b8 100644
--- a/arch/x86/include/asm/crash.h
+++ b/arch/x86/include/asm/crash.h
@@ -2,6 +2,8 @@
 #ifndef _ASM_X86_CRASH_H
 #define _ASM_X86_CRASH_H
 
+struct kimage;
+
 int crash_load_segments(struct kimage *image);
 int crash_copy_backup_region(struct kimage *image);
 int crash_setup_memmap_entries(struct kimage *image,