diff --git a/grub-core/loader/efi/chainloader.c b/grub-core/loader/efi/chainloader.c
index 522a716e3..adc856366 100644
--- a/grub-core/loader/efi/chainloader.c
+++ b/grub-core/loader/efi/chainloader.c
@@ -122,6 +122,8 @@ copy_file_path (grub_efi_file_path_device_path_t *fp,
     if (*p == '/')
       *p = '\\';
 
+  /* File Path is NULL terminated */
+  fp->path_name[size++] = '\0';
   fp->header.length = size * sizeof (grub_efi_char16_t) + sizeof (*fp);
 }
 
@@ -156,8 +158,10 @@ make_file_path (grub_efi_device_path_t *dp, const char *filename)
       d = GRUB_EFI_NEXT_DEVICE_PATH (d);
     }
 
+  /* File Path is NULL terminated. Allocate space for 2 extra characters */
+  /* FIXME why we split path in two components? */
   file_path = grub_malloc (size
-			   + ((grub_strlen (dir_start) + 1)
+			   + ((grub_strlen (dir_start) + 2)
 			      * GRUB_MAX_UTF16_PER_UTF8
 			      * sizeof (grub_efi_char16_t))
 			   + sizeof (grub_efi_file_path_device_path_t) * 2);