diff --git a/src/client.c b/src/client.c
index 02c7c02..b3e1980 100644
--- a/src/client.c
+++ b/src/client.c
@@ -266,6 +266,9 @@
 			txn->rsp.msg_state = HTTP_MSG_RPBEFORE; /* at the very beginning of the response */
 			txn->req.sol = txn->req.eol = NULL;
 			txn->req.som = txn->req.eoh = 0; /* relative to the buffer */
+			txn->req.err_pos = txn->rsp.err_pos = -2; /* block buggy requests/responses */
+			if (p->options2 & PR_O2_REQBUG_OK)
+				txn->req.err_pos = -1; /* let buggy requests pass */
 			txn->auth_hdr.len = -1;
 
 			if (p->nb_req_cap > 0) {