diff --git a/src/proto_http.c b/src/proto_http.c
index c5debca..dbd6a2e 100644
--- a/src/proto_http.c
+++ b/src/proto_http.c
@@ -601,6 +601,8 @@
 		idx->used--;
 		hdr->len = 0;   /* unused entry */
 		idx->v[ctx->prev].next = idx->v[ctx->idx].next;
+		if (idx->tail == ctx->idx)
+			idx->tail = ctx->prev;
 		ctx->idx = ctx->prev;    /* walk back to the end of previous header */
 		ctx->line -= idx->v[ctx->idx].len + idx->v[cur_idx].cr + 1;
 		ctx->val = idx->v[ctx->idx].len; /* point to end of previous header */