diff --git a/tools/rkimage.c b/tools/rkimage.c
index 44d098c..9880b15 100644
--- a/tools/rkimage.c
+++ b/tools/rkimage.c
@@ -13,16 +13,6 @@
 
 static uint32_t header;
 
-static int rkimage_verify_header(unsigned char *buf, int size,
-				 struct image_tool_params *params)
-{
-	return 0;
-}
-
-static void rkimage_print_header(const void *buf)
-{
-}
-
 static void rkimage_set_header(void *buf, struct stat *sbuf, int ifd,
 			       struct image_tool_params *params)
 {
@@ -33,11 +23,6 @@ static void rkimage_set_header(void *buf, struct stat *sbuf, int ifd,
 		rkcommon_rc4_encode_spl(buf, 4, params->file_size);
 }
 
-static int rkimage_extract_subimage(void *buf, struct image_tool_params *params)
-{
-	return 0;
-}
-
 static int rkimage_check_image_type(uint8_t type)
 {
 	if (type == IH_TYPE_RKIMAGE)
@@ -55,10 +40,10 @@ U_BOOT_IMAGE_TYPE(
 	4,
 	&header,
 	rkcommon_check_params,
-	rkimage_verify_header,
-	rkimage_print_header,
+	NULL,
+	NULL,
 	rkimage_set_header,
-	rkimage_extract_subimage,
+	NULL,
 	rkimage_check_image_type,
 	NULL,
 	NULL