diff --git a/src/mux_h2.c b/src/mux_h2.c
index 16c3ba1be..71660f8e8 100644
--- a/src/mux_h2.c
+++ b/src/mux_h2.c
@@ -1808,12 +1808,12 @@ static void h2_process_demux(struct h2c *h2c)
 			h2_skip_frame_hdr(h2c->dbuf);
 		}
 
-		if (h2c->st0 == H2_CS_FRAME_E)
-			goto strm_err;
-
 		/* Only H2_CS_FRAME_P and H2_CS_FRAME_A here */
 		h2s = h2c_st_by_id(h2c, h2c->dsi);
 
+		if (h2c->st0 == H2_CS_FRAME_E)
+			goto strm_err;
+
 		if (h2s->st == H2_SS_IDLE &&
 		    h2c->dft != H2_FT_HEADERS && h2c->dft != H2_FT_PRIORITY) {
 			/* RFC7540#5.1: any frame other than HEADERS or PRIORITY in