diff --git a/doc/fixes34.3 b/doc/fixes34.3
index e3d1ccb6d..0abb94c30 100644
--- a/doc/fixes34.3
+++ b/doc/fixes34.3
@@ -34,6 +34,7 @@ Platform- and/or Interface-Specific Fixes
 -----------------------------------------
 win32tty: fix visible CRLF characters during lockfile error message
 win32gui: you couldn't specify an alignment in defaults.nh and have it stick
+unix: don't define errno if NHSTDC
 
 
 General New Features
diff --git a/src/files.c b/src/files.c
index 7a4f78c5a..73577f94d 100644
--- a/src/files.c
+++ b/src/files.c
@@ -20,6 +20,10 @@
 # if (_MSC_VER >= 600)
 #  define SKIP_ERRNO
 # endif
+#else
+# ifdef NHSTDC
+#  define SKIP_ERRNO
+# endif
 #endif
 #ifndef SKIP_ERRNO
 # ifdef _DCC
diff --git a/sys/unix/unixunix.c b/sys/unix/unixunix.c
index 80756df61..1e1e10eeb 100644
--- a/sys/unix/unixunix.c
+++ b/sys/unix/unixunix.c
@@ -22,6 +22,10 @@ extern void NDECL(linux_mapon);
 extern void NDECL(linux_mapoff);
 #endif
 
+#ifndef NHSTDC
+extern int errno;
+#endif
+
 static struct stat buf;
 
 /* see whether we should throw away this xlock file */
@@ -41,9 +45,6 @@ int fd;
 	(void) time(&date);
 #endif
 	if(date - buf.st_mtime < 3L*24L*60L*60L) {	/* recent */
-#ifndef NETWORK
-		extern int errno;
-#endif
 		int lockedpid;	/* should be the same size as hackpid */
 
 		if(read(fd, (genericptr_t)&lockedpid, sizeof(lockedpid)) !=
@@ -88,7 +89,6 @@ eraseoldlocks()
 void
 getlock()
 {
-	extern int errno;
 	register int i = 0, fd, c;
 	const char *fq_lock;