diff --git a/src/mux_h2.c b/src/mux_h2.c
index eca85cbe2..6105f1bce 100644
--- a/src/mux_h2.c
+++ b/src/mux_h2.c
@@ -2078,7 +2078,7 @@ static struct h2s *h2c_bck_handle_headers(struct h2c *h2c, struct h2s *h2s)
 		h2s->st = H2_SS_ERROR;
 	else if (h2s->cs && (h2s->cs->flags & (CS_FL_EOI|CS_FL_REOS)) && h2s->st == H2_SS_OPEN)
 		h2s->st = H2_SS_HREM;
-	else if ((!h2s || h2s->cs->flags & (CS_FL_EOI|CS_FL_REOS)) && h2s->st == H2_SS_HLOC)
+	else if ((!h2s->cs || h2s->cs->flags & (CS_FL_EOI|CS_FL_REOS)) && h2s->st == H2_SS_HLOC)
 		h2s_close(h2s);
 
 	return h2s;