diff --git a/src/hlua.c b/src/hlua.c
index d37e3c6..4d92fa4 100644
--- a/src/hlua.c
+++ b/src/hlua.c
@@ -5346,7 +5346,7 @@
 	MAY_LJMP(check_args(L, 1, "req_get_headers"));
 	htxn = MAY_LJMP(hlua_checkhttp(L, 1));
 
-	if (htxn->dir != SMP_OPT_DIR_REQ)
+	if (htxn->dir != SMP_OPT_DIR_REQ || !(htxn->flags & HLUA_TXN_HTTP_RDY))
 		WILL_LJMP(lua_error(L));
 
 	return hlua_http_get_headers(L, htxn, &htxn->s->txn->req);
@@ -5359,7 +5359,7 @@
 	MAY_LJMP(check_args(L, 1, "res_get_headers"));
 	htxn = MAY_LJMP(hlua_checkhttp(L, 1));
 
-	if (htxn->dir != SMP_OPT_DIR_RES)
+	if (htxn->dir != SMP_OPT_DIR_RES || !(htxn->flags & HLUA_TXN_HTTP_RDY))
 		WILL_LJMP(lua_error(L));
 
 	return hlua_http_get_headers(L, htxn, &htxn->s->txn->rsp);
@@ -5399,7 +5399,7 @@
 	MAY_LJMP(check_args(L, 4, "req_rep_hdr"));
 	htxn = MAY_LJMP(hlua_checkhttp(L, 1));
 
-	if (htxn->dir != SMP_OPT_DIR_REQ)
+	if (htxn->dir != SMP_OPT_DIR_REQ || !(htxn->flags & HLUA_TXN_HTTP_RDY))
 		WILL_LJMP(lua_error(L));
 
 	return MAY_LJMP(hlua_http_rep_hdr(L, htxn, &htxn->s->txn->req, ACT_HTTP_REPLACE_HDR));
@@ -5412,7 +5412,7 @@
 	MAY_LJMP(check_args(L, 4, "res_rep_hdr"));
 	htxn = MAY_LJMP(hlua_checkhttp(L, 1));
 
-	if (htxn->dir != SMP_OPT_DIR_RES)
+	if (htxn->dir != SMP_OPT_DIR_RES || !(htxn->flags & HLUA_TXN_HTTP_RDY))
 		WILL_LJMP(lua_error(L));
 
 	return MAY_LJMP(hlua_http_rep_hdr(L, htxn, &htxn->s->txn->rsp, ACT_HTTP_REPLACE_HDR));
@@ -5425,7 +5425,7 @@
 	MAY_LJMP(check_args(L, 4, "req_rep_hdr"));
 	htxn = MAY_LJMP(hlua_checkhttp(L, 1));
 
-	if (htxn->dir != SMP_OPT_DIR_REQ)
+	if (htxn->dir != SMP_OPT_DIR_REQ || !(htxn->flags & HLUA_TXN_HTTP_RDY))
 		WILL_LJMP(lua_error(L));
 
 	return MAY_LJMP(hlua_http_rep_hdr(L, htxn, &htxn->s->txn->req, ACT_HTTP_REPLACE_VAL));
@@ -5438,7 +5438,7 @@
 	MAY_LJMP(check_args(L, 4, "res_rep_val"));
 	htxn = MAY_LJMP(hlua_checkhttp(L, 1));
 
-	if (htxn->dir != SMP_OPT_DIR_RES)
+	if (htxn->dir != SMP_OPT_DIR_RES || !(htxn->flags & HLUA_TXN_HTTP_RDY))
 		WILL_LJMP(lua_error(L));
 
 	return MAY_LJMP(hlua_http_rep_hdr(L, htxn, &htxn->s->txn->rsp, ACT_HTTP_REPLACE_VAL));
@@ -5480,7 +5480,7 @@
 	MAY_LJMP(check_args(L, 2, "req_del_hdr"));
 	htxn = MAY_LJMP(hlua_checkhttp(L, 1));
 
-	if (htxn->dir != SMP_OPT_DIR_REQ)
+	if (htxn->dir != SMP_OPT_DIR_REQ || !(htxn->flags & HLUA_TXN_HTTP_RDY))
 		WILL_LJMP(lua_error(L));
 
 	return hlua_http_del_hdr(L, htxn, &htxn->s->txn->req);
@@ -5493,7 +5493,7 @@
 	MAY_LJMP(check_args(L, 2, "res_del_hdr"));
 	htxn = MAY_LJMP(hlua_checkhttp(L, 1));
 
-	if (htxn->dir != SMP_OPT_DIR_RES)
+	if (htxn->dir != SMP_OPT_DIR_RES || !(htxn->flags & HLUA_TXN_HTTP_RDY))
 		WILL_LJMP(lua_error(L));
 
 	return hlua_http_del_hdr(L, htxn, &htxn->s->txn->rsp);
@@ -5547,7 +5547,7 @@
 	MAY_LJMP(check_args(L, 3, "req_add_hdr"));
 	htxn = MAY_LJMP(hlua_checkhttp(L, 1));
 
-	if (htxn->dir != SMP_OPT_DIR_REQ)
+	if (htxn->dir != SMP_OPT_DIR_REQ || !(htxn->flags & HLUA_TXN_HTTP_RDY))
 		WILL_LJMP(lua_error(L));
 
 	return hlua_http_add_hdr(L, htxn, &htxn->s->txn->req);
@@ -5560,7 +5560,7 @@
 	MAY_LJMP(check_args(L, 3, "res_add_hdr"));
 	htxn = MAY_LJMP(hlua_checkhttp(L, 1));
 
-	if (htxn->dir != SMP_OPT_DIR_RES)
+	if (htxn->dir != SMP_OPT_DIR_RES || !(htxn->flags & HLUA_TXN_HTTP_RDY))
 		WILL_LJMP(lua_error(L));
 
 	return hlua_http_add_hdr(L, htxn, &htxn->s->txn->rsp);
@@ -5573,7 +5573,7 @@
 	MAY_LJMP(check_args(L, 3, "req_set_hdr"));
 	htxn = MAY_LJMP(hlua_checkhttp(L, 1));
 
-	if (htxn->dir != SMP_OPT_DIR_REQ)
+	if (htxn->dir != SMP_OPT_DIR_REQ || !(htxn->flags & HLUA_TXN_HTTP_RDY))
 		WILL_LJMP(lua_error(L));
 
 	hlua_http_del_hdr(L, htxn, &htxn->s->txn->req);
@@ -5587,7 +5587,7 @@
 	MAY_LJMP(check_args(L, 3, "res_set_hdr"));
 	htxn = MAY_LJMP(hlua_checkhttp(L, 1));
 
-	if (htxn->dir != SMP_OPT_DIR_RES)
+	if (htxn->dir != SMP_OPT_DIR_RES || !(htxn->flags & HLUA_TXN_HTTP_RDY))
 		WILL_LJMP(lua_error(L));
 
 	hlua_http_del_hdr(L, htxn, &htxn->s->txn->rsp);
@@ -5601,7 +5601,7 @@
 	size_t name_len;
 	const char *name = MAY_LJMP(luaL_checklstring(L, 2, &name_len));
 
-	if (htxn->dir != SMP_OPT_DIR_REQ)
+	if (htxn->dir != SMP_OPT_DIR_REQ || !(htxn->flags & HLUA_TXN_HTTP_RDY))
 		WILL_LJMP(lua_error(L));
 
 	lua_pushboolean(L, http_replace_req_line(0, name, name_len, htxn->p, htxn->s) != -1);
@@ -5615,7 +5615,7 @@
 	size_t name_len;
 	const char *name = MAY_LJMP(luaL_checklstring(L, 2, &name_len));
 
-	if (htxn->dir != SMP_OPT_DIR_REQ)
+	if (htxn->dir != SMP_OPT_DIR_REQ || !(htxn->flags & HLUA_TXN_HTTP_RDY))
 		WILL_LJMP(lua_error(L));
 
 	lua_pushboolean(L, http_replace_req_line(1, name, name_len, htxn->p, htxn->s) != -1);
@@ -5629,7 +5629,7 @@
 	size_t name_len;
 	const char *name = MAY_LJMP(luaL_checklstring(L, 2, &name_len));
 
-	if (htxn->dir != SMP_OPT_DIR_REQ)
+	if (htxn->dir != SMP_OPT_DIR_REQ || !(htxn->flags & HLUA_TXN_HTTP_RDY))
 		WILL_LJMP(lua_error(L));
 
 	/* Check length. */
@@ -5656,7 +5656,7 @@
 	size_t name_len;
 	const char *name = MAY_LJMP(luaL_checklstring(L, 2, &name_len));
 
-	if (htxn->dir != SMP_OPT_DIR_REQ)
+	if (htxn->dir != SMP_OPT_DIR_REQ || !(htxn->flags & HLUA_TXN_HTTP_RDY))
 		WILL_LJMP(lua_error(L));
 
 	lua_pushboolean(L, http_replace_req_line(3, name, name_len, htxn->p, htxn->s) != -1);
@@ -5670,7 +5670,7 @@
 	unsigned int code = MAY_LJMP(luaL_checkinteger(L, 2));
 	const char *reason = MAY_LJMP(luaL_optlstring(L, 3, NULL, NULL));
 
-	if (htxn->dir != SMP_OPT_DIR_RES)
+	if (htxn->dir != SMP_OPT_DIR_RES || !(htxn->flags & HLUA_TXN_HTTP_RDY))
 		WILL_LJMP(lua_error(L));
 
 	http_set_status(code, reason, htxn->s);