diff --git a/drivers/orinoco/orinoco.c b/drivers/orinoco/orinoco.c
index 138f3733f..3d0f44bbe 100644
--- a/drivers/orinoco/orinoco.c
+++ b/drivers/orinoco/orinoco.c
@@ -1287,8 +1287,6 @@ next:
 	if(evstat != 0 && !(evstat & HERMES_EV_TICK)) {
 		goto beginning;
 	}
-
-	return (1);
 }
 
 
diff --git a/include/minix/minlib.h b/include/minix/minlib.h
index 3fe63fb28..9c9c3187e 100644
--- a/include/minix/minlib.h
+++ b/include/minix/minlib.h
@@ -11,7 +11,7 @@ _PROTOTYPE(char *itoa, (int _n));
 _PROTOTYPE(char *getpass, (const char *_prompt));
 
 /* Miscellaneous MINIX. */
-_PROTOTYPE(void std_err, (char *_s));
+_PROTOTYPE(void std_err, (const char *_s));
 _PROTOTYPE(void prints, (const char *_s, ...));
 _PROTOTYPE(int fsversion, (char *_dev, char *_prog));
 _PROTOTYPE(int getprocessor, (void));
diff --git a/include/unistd.h b/include/unistd.h
index c353472c2..5c4b81549 100644
--- a/include/unistd.h
+++ b/include/unistd.h
@@ -137,7 +137,6 @@ _PROTOTYPE( ssize_t pread, (int, void *, size_t, off_t)			);
 _PROTOTYPE( int rmdir, (const char *_path)				);
 _PROTOTYPE( int setgid, (_mnx_Gid_t _gid)				);
 _PROTOTYPE( int setegid, (_mnx_Gid_t _gid)				);
-_PROTOTYPE( int setpgid, (pid_t _pid, pid_t _pgid)			);
 _PROTOTYPE( pid_t setsid, (void)					);
 _PROTOTYPE( int setuid, (_mnx_Uid_t _uid)				);
 _PROTOTYPE( int seteuid, (_mnx_Uid_t _uid)				);
diff --git a/lib/libc/other/stderr.c b/lib/libc/other/stderr.c
index b7031287e..fd7f65b4b 100644
--- a/lib/libc/other/stderr.c
+++ b/lib/libc/other/stderr.c
@@ -2,12 +2,9 @@
 #include <sys/types.h>
 #include <unistd.h>
 
-_PROTOTYPE( void std_err, (char *s));
-
-void std_err(s)
-char *s;
+void std_err(const char *s)
 {
-  register char *p = s;
+  register const char *p = s;
 
   while (*p != 0) p++;
   write(2, s, (int) (p - s));