diff --git a/plugin/protocol/http/src/http_half.cpp b/plugin/protocol/http/src/http_half.cpp
index 6a05f1a..d35f507 100644
--- a/plugin/protocol/http/src/http_half.cpp
+++ b/plugin/protocol/http/src/http_half.cpp
@@ -1087,6 +1087,9 @@ void hf_private_construct(struct http_half_private * hf_private)
 	{
 		const char * __str_content_encoding = __hf_content_encoding_to_str(hf_private->content_encoding);
 		const static struct http_field_name __cont_encoding_type_name = {TFE_HTTP_CONT_ENCODING, NULL};
+
+		/* Delete the origin encoding type, and add a new one */
+		tfe_http_field_write(hf_public, &__cont_encoding_type_name, NULL);
 		tfe_http_field_write(hf_public, &__cont_encoding_type_name, __str_content_encoding);
 	}
 
@@ -1098,6 +1101,7 @@ void hf_private_construct(struct http_half_private * hf_private)
 		snprintf(str_sz_evbuf_body, sizeof(str_sz_evbuf_body) - 1, "%lu", evbuffer_get_length(hf_private->evbuf_body));
 
 		const static struct http_field_name __cont_encoding_length_name = {TFE_HTTP_CONT_LENGTH, NULL};
+		tfe_http_field_write(hf_public, &__cont_encoding_length_name, NULL);
 		tfe_http_field_write(hf_public, &__cont_encoding_length_name, str_sz_evbuf_body);
 
 		/* If origin is chunked, now delete chunked tag */