diff --git a/util/ack/Makefile b/util/ack/Makefile
index ff37a1500..53409a618 100644
--- a/util/ack/Makefile
+++ b/util/ack/Makefile
@@ -6,7 +6,7 @@ DSRC=list.c data.c main.c scan.c svars.c trans.c util.c rmach.c run.c grows.c\
 ISRC=dmach.c intable.c
 OBJ=list.o data.o main.o scan.o svars.o trans.o util.o rmach.o run.o \
     dmach.o intable.o grows.o files.o
-ACKDIR=$(EMHOME)/lib/descr
+ACKDIR=$(EMHOME)/lib
 FE=fe
 INTABLES=pdp int
 LNTABLES=acc apc abc ocm vax4 i86 m68k2 m68k4 pmds pmds4 mantra \
diff --git a/util/ack/ack.1.X b/util/ack/ack.1.X
index 2e12ab263..74504aae0 100644
--- a/util/ack/ack.1.X
+++ b/util/ack/ack.1.X
@@ -219,7 +219,7 @@ routines for systems calls needed by both C and Pascal.
 When linking multiple \fI.o\fP or \fI.m\fP files created by
 separate calls of \fIack\fP together, \fIack\fP cannot deduce
 the run-time system needed,
-unless called as \fIapc\fP, \fIabc\P, \fIocm\fP or \fIacc\fP.
+unless called as \fIapc\fP, \fIabc\fP, \fIocm\fP or \fIacc\fP.
 This flag serves to tell \fIack\fP which runtime system is
 needed in such a case.
 For example: "ack \-c x.c ; ack \-.c x.o".
diff --git a/util/ack/grows.c b/util/ack/grows.c
index d7b3c833f..d42d51fee 100644
--- a/util/ack/grows.c
+++ b/util/ack/grows.c
@@ -53,6 +53,7 @@ gr_throw(id) register growstring *id ; {
 	/* Throw the string away */
 	if ( id->gr_max==0 ) return ;
 	freecore(id->gr_string) ;
+	id->gr_string = 0 ;
 	id->gr_max=0 ;
 	id->gr_size=0 ;
 }