diff --git a/src/mux_fcgi.c b/src/mux_fcgi.c
index 3e1cff852..2cc517708 100644
--- a/src/mux_fcgi.c
+++ b/src/mux_fcgi.c
@@ -2788,7 +2788,6 @@ static int fcgi_recv(struct fcgi_conn *fconn)
 		return 0;
 	}
 
-	b_realign_if_empty(buf);
 	if (!b_data(buf)) {
 		/* try to pre-align the buffer like the
 		 * rxbufs will be to optimize memory copies. We'll make
diff --git a/src/mux_h1.c b/src/mux_h1.c
index 4262b541e..a3aa3889e 100644
--- a/src/mux_h1.c
+++ b/src/mux_h1.c
@@ -2547,7 +2547,6 @@ static int h1_recv(struct h1c *h1c)
 			TRACE_STATE("h1c ibuf not full anymore", H1_EV_H1C_RECV|H1_EV_H1C_BLK);
 		}
 
-		b_realign_if_empty(&h1c->ibuf);
 		if (!b_data(&h1c->ibuf)) {
 			/* try to pre-align the buffer like the rxbufs will be
 			 * to optimize memory copies.
diff --git a/src/mux_h2.c b/src/mux_h2.c
index 5f35d8928..4d7142247 100644
--- a/src/mux_h2.c
+++ b/src/mux_h2.c
@@ -3617,7 +3617,6 @@ static int h2_recv(struct h2c *h2c)
 		return 0;
 	}
 
-	b_realign_if_empty(buf);
 	if (!b_data(buf)) {
 		/* try to pre-align the buffer like the
 		 * rxbufs will be to optimize memory copies. We'll make