diff --git a/osdep-aix.c b/osdep-aix.c
index e1ce4918..8e7db426 100644
--- a/osdep-aix.c
+++ b/osdep-aix.c
@@ -16,75 +16,19 @@
  * OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  */
 
-#include <sys/param.h>
-#include <sys/procfs.h>
-
-#include <stdlib.h>
-#include <string.h>
-#include <fcntl.h>
+#include <sys/types.h>
 
 #include "tmux.h"
 
 char *
-osdep_get_name(__unused int fd, char *tty)
+osdep_get_name(__unused int fd, __unused char *tty)
 {
-	struct psinfo	 p;
-	char		*path;
-	ssize_t		 bytes;
-	int		 f, ttyfd, retval;
-	pid_t		 pgrp;
-
-	if ((ttyfd = open(tty, O_RDONLY|O_NOCTTY)) == -1)
-		return (NULL);
-
-	retval = ioctl(ttyfd, TIOCGPGRP, &pgrp);
-	close(ttyfd);
-	if (retval == -1)
-		return (NULL);
-
-	xasprintf(&path, "/proc/%u/psinfo", (u_int) pgrp);
-	f = open(path, O_RDONLY);
-	free(path);
-	if (f < 0)
-		return (NULL);
-
-	bytes = read(f, &p, sizeof(p));
-	close(f);
-	if (bytes != sizeof(p))
-		return (NULL);
-
-	return (xstrdup(p.pr_fname));
+	return (NULL);
 }
 
 char *
-osdep_get_cwd(int fd)
+osdep_get_cwd(__unused int fd)
 {
-	static char      target[MAXPATHLEN + 1];
-	char            *path;
-	const char      *ttypath;
-	ssize_t          n;
-	pid_t            pgrp;
-	int              len, retval, ttyfd;
-
-	if ((ttypath = ptsname(fd)) == NULL)
-		return (NULL);
-	if ((ttyfd = open(ttypath, O_RDONLY|O_NOCTTY)) == -1)
-		return (NULL);
-
-	retval = ioctl(ttyfd, TIOCGPGRP, &pgrp);
-	close(ttyfd);
-	if (retval == -1)
-		return (NULL);
-
-	xasprintf(&path, "/proc/%u/cwd", (u_int) pgrp);
-	n = readlink(path, target, MAXPATHLEN);
-	free(path);
-	if (n > 0) {
-		target[n] = '\0';
-		if ((len = strlen(target)) > 1 && target[len - 1] == '/')
-			target[len - 1] = '\0';
-		return (target);
-	}
 	return (NULL);
 }
 
diff --git a/osdep-haiku.c b/osdep-haiku.c
index 7b1f800a..5dfee973 100644
--- a/osdep-haiku.c
+++ b/osdep-haiku.c
@@ -40,7 +40,7 @@ osdep_get_name(int fd, __unused char *tty)
 }
 
 char *
-osdep_get_cwd(int fd)
+osdep_get_cwd(__unused int fd)
 {
 	return (NULL);
 }