diff --git a/sbin/dump/dump.8 b/sbin/dump/dump.8
index 8e6339994845..a6362c174a2d 100644
--- a/sbin/dump/dump.8
+++ b/sbin/dump/dump.8
@@ -312,7 +312,8 @@ after the old tape has been rewound and removed,
 and a new tape has been mounted.
 .Pp
 .Nm Dump
-tells the operator what is going on at periodic intervals,
+tells the operator what is going on at periodic intervals --
+every 5 minutes, or promptly after receiving SIGINFO --
 including usually low estimates of the number of blocks to write,
 the number of tapes it will take, the time to completion, and
 the time to the tape change.
diff --git a/sbin/dump/dump.h b/sbin/dump/dump.h
index f2658868f6de..d9bff13ed9b7 100644
--- a/sbin/dump/dump.h
+++ b/sbin/dump/dump.h
@@ -95,6 +95,7 @@ int	tp_bshift;	/* log2(TP_BSIZE) */
 
 /* operator interface functions */
 void	broadcast __P((char *message));
+void	infosch __P((int));
 void	lastdump __P((int arg));	/* int should be char */
 void	msg __P((const char *fmt, ...)) __printflike(1, 2);
 void	msgtail __P((const char *fmt, ...)) __printflike(1, 2);
diff --git a/sbin/dump/optr.c b/sbin/dump/optr.c
index 1c53cdda8a44..a35b550a903f 100644
--- a/sbin/dump/optr.c
+++ b/sbin/dump/optr.c
@@ -51,6 +51,7 @@ static const char rcsid[] =
 #include <stdlib.h>
 #include <string.h>
 #include <stdarg.h>
+#include <signal.h>
 #include <unistd.h>
 #include <utmp.h>
 
@@ -195,7 +196,7 @@ timeest()
 	time_t	tnow;
 	int deltat;
 
-	(void) time((time_t *) &tnow);
+	(void) time(&tnow);
 	if (tnow >= tschedule) {
 		tschedule = tnow + 300;
 		if (blockswritten < 500)
@@ -209,6 +210,16 @@ timeest()
 	}
 }
 
+/*
+ * Schedule a printout of the estimate in the next call to timeest().
+ */
+void
+infosch(signal)
+	int signal;
+{
+	tschedule = 0;
+}
+
 void
 #if __STDC__
 msg(const char *fmt, ...)
diff --git a/sbin/dump/tape.c b/sbin/dump/tape.c
index 10b05c9f30e6..25c97630f774 100644
--- a/sbin/dump/tape.c
+++ b/sbin/dump/tape.c
@@ -617,6 +617,7 @@ startnewtape(top)
 		}
 
 		enslave();  /* Share open tape file descriptor with slaves */
+		signal(SIGINFO, infosch);
 
 		asize = 0;
 		blocksthisvol = 0;