diff --git a/src/m/alliant-2800.h b/src/m/alliant-2800.h
index 89f8186a38487f48cb26420b770a12c56aef2758..4306e1933988f201d3f8d38ffb1c695ac02550f9 100644
--- a/src/m/alliant-2800.h
+++ b/src/m/alliant-2800.h
@@ -141,4 +141,3 @@ unexec_text_start = hdr.a_text_addr;}
 /* POSIX Compatibility */
 /* Use System V.4 style getdents/readdir <dirent.h> for 2.2 and up. */
 #define SYSV_SYSTEM_DIR
-#define HAVE_CLOSEDIR
diff --git a/src/m/convex.h b/src/m/convex.h
index add31659d04eb668d6ec6ca12fe45bfa6ad140c8..68db4539681546bae8bbbcc87a5a184997d56469 100644
--- a/src/m/convex.h
+++ b/src/m/convex.h
@@ -136,7 +136,6 @@ the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.  */
 
 /* Use <dirent.h>. */
 #define SYSV_SYSTEM_DIR
-#define HAVE_CLOSEDIR
 
 #ifdef _POSIX_SOURCE
 
diff --git a/src/m/pfa50.h b/src/m/pfa50.h
index 3fe0da32c97556a559adbd099c8f5efe932ba526..52893733721ad00cfd945f5f212361f4292fbb6f 100644
--- a/src/m/pfa50.h
+++ b/src/m/pfa50.h
@@ -94,7 +94,6 @@ the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.  */
 #define HAVE_SOCKETS
 
 /* SX/A use SystemV style getdents/readdir. */
-#define HAVE_CLOSEDIR
 
 /* SX/A does not have sigblock(2) */
 #define sigblock(mask)	(0)
diff --git a/src/s/gnu-linux.h b/src/s/gnu-linux.h
index b26778c64cf731fe504f8c69f4f1bfa192ebb8c5..c30ae7c4ffc3ea3b05631e64b28b8cec25790a61 100644
--- a/src/s/gnu-linux.h
+++ b/src/s/gnu-linux.h
@@ -182,7 +182,6 @@ the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.  */
 #if 0 /* autoconf should take care of this.  */
 #define HAVE_RANDOM           /* is builtin */
 #endif
-#define HAVE_CLOSEDIR
 #define HAVE_GETPAGESIZE
 #define HAVE_VFORK
 #define HAVE_SYS_SIGLIST
diff --git a/src/s/isc2-2.h b/src/s/isc2-2.h
index 9cbc448ca2450c714c6b8bec3831946b5368c65a..b02f356e97e7c451a8eaf867a93276d6eb3cfb71 100644
--- a/src/s/isc2-2.h
+++ b/src/s/isc2-2.h
@@ -23,7 +23,6 @@
 #define NO_FCHMOD
 
 #define HAVE_PTYS
-#define HAVE_CLOSEDIR
 #define MAXNAMLEN 512
 #define O_NDELAY O_NONBLOCK
 #define MEMORY_IN_STRING_H
diff --git a/src/s/usg5-4.h b/src/s/usg5-4.h
index 30b3acb62a0f3f847f4e5c4f8995fcc86b03e5ef..e91f38cfe049a3f964def1789f2c40903b817883 100644
--- a/src/s/usg5-4.h
+++ b/src/s/usg5-4.h
@@ -87,7 +87,6 @@ the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.  */
 
 #define HAVE_SELECT
 #define HAVE_TIMEVAL
-#define HAVE_CLOSEDIR
 
 /* <sys/stat.h> *defines* stat(2) as a static function.  If "static"
  * is blank, then many files will have a public definition for stat(2).