diff --git a/src/mux_fcgi.c b/src/mux_fcgi.c
index cdb118c3a..cfe39dd83 100644
--- a/src/mux_fcgi.c
+++ b/src/mux_fcgi.c
@@ -845,9 +845,7 @@ static void fcgi_release(struct fcgi_conn *fconn)
 	TRACE_POINT(FCGI_EV_FCONN_END);
 
 	if (fconn) {
-		/* The connection must be attached to this mux to be released */
-		if (fconn->conn && fconn->conn->ctx == fconn)
-			conn = fconn->conn;
+		conn = fconn->conn;
 
 		TRACE_DEVEL("freeing fconn", FCGI_EV_FCONN_END, conn);
 
@@ -3576,8 +3574,10 @@ static void fcgi_destroy(void *ctx)
 	struct fcgi_conn *fconn = ctx;
 
 	TRACE_POINT(FCGI_EV_FCONN_END, fconn->conn);
-	if (eb_is_empty(&fconn->streams_by_id) || fconn->conn->ctx != fconn)
+	if (eb_is_empty(&fconn->streams_by_id)) {
+		BUG_ON(fconn->conn->ctx != fconn);
 		fcgi_release(fconn);
+	}
 }
 
 /*
diff --git a/src/mux_h2.c b/src/mux_h2.c
index d73e0cf44..000f23124 100644
--- a/src/mux_h2.c
+++ b/src/mux_h2.c
@@ -1166,9 +1166,7 @@ static void h2_release(struct h2c *h2c)
 	TRACE_ENTER(H2_EV_H2C_END);
 
 	if (h2c) {
-		/* The connection must be aattached to this mux to be released */
-		if (h2c->conn && h2c->conn->ctx == h2c)
-			conn = h2c->conn;
+		conn = h2c->conn;
 
 		TRACE_DEVEL("freeing h2c", H2_EV_H2C_END, conn);
 		hpack_dht_free(h2c->ddht);
@@ -4350,8 +4348,10 @@ static void h2_destroy(void *ctx)
 	struct h2c *h2c = ctx;
 
 	TRACE_ENTER(H2_EV_H2C_END, h2c->conn);
-	if (eb_is_empty(&h2c->streams_by_id) || h2c->conn->ctx != h2c)
+	if (eb_is_empty(&h2c->streams_by_id)) {
+		BUG_ON(h2c->conn->ctx != h2c);
 		h2_release(h2c);
+	}
 	TRACE_LEAVE(H2_EV_H2C_END);
 }
 
diff --git a/src/mux_quic.c b/src/mux_quic.c
index 2051bff10..aea649100 100644
--- a/src/mux_quic.c
+++ b/src/mux_quic.c
@@ -502,9 +502,7 @@ static void qc_release(struct qcc *qcc)
 	if (qcc) {
 		struct eb64_node *node;
 
-		/* The connection must be aattached to this mux to be released */
-		if (qcc->conn && qcc->conn->ctx == qcc)
-			conn = qcc->conn;
+		conn = qcc->conn;
 
 		TRACE_DEVEL("freeing qcc", QMUX_EV_QCC_END, conn);