diff --git a/appl/ftp/ftpd/auth.c b/appl/ftp/ftpd/auth.c
index eea44563d..efce62375 100644
--- a/appl/ftp/ftpd/auth.c
+++ b/appl/ftp/ftpd/auth.c
@@ -50,7 +50,7 @@ RCSID("$Id$");
 #ifdef HAVE_SYS_SOCKET_H
 #include <sys/socket.h>
 #endif
-#ifdef HAVE_SYS_IOCTL_H
+#if defined(HAVE_SYS_IOCTL_H) && SunOS != 4
 #include <sys/ioctl.h>
 #endif
 #ifdef HAVE_UNISTD_H
diff --git a/lib/kafs/kafs_locl.h b/lib/kafs/kafs_locl.h
index d44abac1a..fe3dced8a 100644
--- a/lib/kafs/kafs_locl.h
+++ b/lib/kafs/kafs_locl.h
@@ -57,7 +57,7 @@
 #ifdef HAVE_UNISTD_H
 #include <unistd.h>
 #endif
-#ifdef HAVE_SYS_IOCTL_H
+#if defined(HAVE_SYS_IOCTL_H) && SunOS != 4
 #include <sys/ioctl.h>
 #endif
 #ifdef HAVE_SYS_FILIO_H