diff --git a/doc/install.doc b/doc/install.doc
index 04dd5814e..fd9dae84a 100644
--- a/doc/install.doc
+++ b/doc/install.doc
@@ -1084,7 +1084,7 @@ directory "first".
 Em_path.h also specifies which directory should be used for
 temporary files.
 Most programs from the Kit do indeed use that directory
-although some remain stubborn and use /tmp or /usr/tmp.
+although some remain stubborn and use /tmp.
 .LP
 The shape of the tree should not be altered lightly because
 most Makefiles and the
diff --git a/emtest/select.c b/emtest/select.c
index fcf1c37dd..8d1f9c6a0 100644
--- a/emtest/select.c
+++ b/emtest/select.c
@@ -32,9 +32,9 @@ int	high	= 999;
 FILE	*file1;
 FILE	*file2;
 FILE	*file3;
-char	name1[] = "/usr/tmp/f1XXXXXX";
-char	name2[] = "/usr/tmp/f2XXXXXX";
-char	name3[] = "/usr/tmp/f3XXXXXX";
+char	name1[] = "/tmp/f1XXXXXX";
+char	name2[] = "/tmp/f2XXXXXX";
+char	name3[] = "/tmp/f3XXXXXX";
 
 char *to3dig();
 
diff --git a/first/first b/first/first
index 430034daa..0bd2d5c83 100755
--- a/first/first
+++ b/first/first
@@ -18,14 +18,7 @@ else
 fi
 export E_FLAG E_SFX
 
-echo check write-ability of /tmp and /usr/tmp ...
-if ( >/usr/tmp/aaax.$$ )
-then
-	rm /usr/tmp/aaax.$$
-else
-	echo /usr/tmp must exist and be writable.
-	exit 2
-fi
+echo check write-ability of /tmp ...
 if ( >/tmp/aaax.$$ )
 then
 	rm /tmp/aaax.$$
@@ -33,7 +26,7 @@ else
 	echo /tmp must exist and be writable.
 	exit 2
 fi
-echo "/tmp and /usr/tmp ok"
+echo "/tmp ok"
 
 if [ -f macros ]
 then
diff --git a/lang/cem/lint/lpass2/lint b/lang/cem/lint/lpass2/lint
index 719cd0ae7..556aabf42 100755
--- a/lang/cem/lint/lpass2/lint
+++ b/lang/cem/lint/lpass2/lint
@@ -22,8 +22,8 @@ LLIB=${LLIB-"$EMLINT/llib"}			# lint libraries directory
 LINTLIB=${LINTLIB-$LLIB}
 CLIB=c.llb
 
-TMP=/usr/tmp/lint1.$$
-NEW=/usr/tmp/lint2.$$
+TMP=/tmp/lint1.$$
+NEW=/tmp/lint2.$$
 
 trap "rm -f $TMP $NEW; exit 1" 1 2 15
 trap "rm -f $TMP $NEW; exit 0" 0
diff --git a/lang/pc/libpc/opn.c b/lang/pc/libpc/opn.c
index 99e24c0c3..83b9ba49f 100644
--- a/lang/pc/libpc/opn.c
+++ b/lang/pc/libpc/opn.c
@@ -39,7 +39,7 @@ extern int		_unlink();
 extern long		_lseek();
 
 static int tmpfil() {
-	static char namebuf[] = "/usr/tmp/plf.xxxxx";
+	static char namebuf[] = "/tmp/plf.xxxxx";
 	int i; char *p,*q;
 
 	i = _getpid();
diff --git a/mach/m68k2/Unisoft_bug b/mach/m68k2/Unisoft_bug
index bb217603f..628b4e23e 100644
--- a/mach/m68k2/Unisoft_bug
+++ b/mach/m68k2/Unisoft_bug
@@ -1,9 +1,9 @@
 The following modifications to the file-system are required when
 installing ACK under UniSoft Unix:
 
-1) Create a writable directory /usr/tmp (if not present already)
-     mkdir /usr/tmp
-     chmod 777 /usr/tmp
+1) Create a writable directory /tmp (if not present already)
+     mkdir /tmp
+     chmod 777 /tmp
 2) Install the file "assert.h" in /usr/include (this file is not
    included in the Unisoft distribution, although it is standard V7 Unix).
    The file can be copied from the ACK-tree:
diff --git a/util/opt/em_opt.6 b/util/opt/em_opt.6
index cfea28809..bdb6587d9 100644
--- a/util/opt/em_opt.6
+++ b/util/opt/em_opt.6
@@ -30,7 +30,7 @@ option.
 .IP -ml<num>
 Like -m<num>, but also for long multiplies.
 .SH "FILES"
-/usr/tmp/emopt??????, is used when the -L flag is given only.
+/tmp/emopt??????, is used when the -L flag is given only.
 .SH "SEE ALSO"
 ack(1)
 .PD 0
diff --git a/util/opt/var.c b/util/opt/var.c
index 6c45147aa..58c803f03 100644
--- a/util/opt/var.c
+++ b/util/opt/var.c
@@ -25,7 +25,7 @@ bool	repl_longmuls = 0;	/* replacing longmuls as well? */
 line_p	instrs,pseudos;		/* pointers to chains */
 sym_p	symhash[NSYMHASH];	/* array of pointers to chains */
 FILE	*outfile;
-char	template[] = "/usr/tmp/emoptXXXXXX";
+char	template[] = "/tmp/emoptXXXXXX";
 offset	wordsize = 0;
 offset	pointersize = 0;
 char	*progname;