diff --git a/sys/netinet/tcp_hpts.h b/sys/netinet/tcp_hpts.h
--- a/sys/netinet/tcp_hpts.h
+++ b/sys/netinet/tcp_hpts.h
@@ -115,7 +115,9 @@
 static inline bool
 tcp_in_hpts(struct tcpcb *tp)
 {
-	return (tp->t_in_hpts == IHPTS_ONQUEUE);
+	return ((tp->t_in_hpts == IHPTS_ONQUEUE) ||
+		((tp->t_in_hpts == IHPTS_MOVING) &&
+		 (tp->t_hpts_slot != -1)));
 }
 
 /*
@@ -208,6 +210,17 @@
 	return (tcp_tv_to_hptstick(sv));
 }
 
+static __inline uint64_t
+tcp_get_u64_usecs(struct timeval *tv)
+{
+	struct timeval tvd;
+
+	if (tv == NULL)
+		tv = &tvd;
+	microuptime(tv);
+	return (tcp_tv_to_lusectick(tv));
+}
+
 static __inline uint32_t
 tcp_get_usecs(struct timeval *tv)
 {
diff --git a/sys/netinet/tcp_hpts.c b/sys/netinet/tcp_hpts.c
--- a/sys/netinet/tcp_hpts.c
+++ b/sys/netinet/tcp_hpts.c
@@ -820,7 +820,7 @@
 
 	INP_WLOCK_ASSERT(tptoinpcb(tp));
 	MPASS(!(tptoinpcb(tp)->inp_flags & INP_DROPPED));
-	MPASS(!tcp_in_hpts(tp));
+	MPASS(!(tp->t_in_hpts == IHPTS_ONQUEUE));
 
 	/*
 	 * We now return the next-slot the hpts will be on, beyond its