diff --git a/libc/include/lastlog.h b/libc/include/lastlog.h
index e69de29..4f46106 100644
--- a/libc/include/lastlog.h
+++ b/libc/include/lastlog.h
@@ -0,0 +1,2 @@
+/* This is a BSD synonym for <utmp.h> that's also provided by glibc. */
+#include <utmp.h>
diff --git a/libc/include/limits.h b/libc/include/limits.h
index 342217b..01b7a49 100644
--- a/libc/include/limits.h
+++ b/libc/include/limits.h
@@ -52,10 +52,6 @@
 
 #include <sys/limits.h>
 
-#if __POSIX_VISIBLE
-#include <sys/syslimits.h>
-#endif
-
 /* GLibc compatibility definitions.
    Note that these are defined by GCC's <limits.h>
    only when __GNU_LIBRARY__ is defined, i.e. when
diff --git a/libc/include/sys/syslimits.h b/libc/include/sys/syslimits.h
deleted file mode 100644
index e69de29..0000000
--- a/libc/include/sys/syslimits.h
+++ /dev/null
diff --git a/libc/include/sys/ttychars.h b/libc/include/sys/ttychars.h
deleted file mode 100644
index e69de29..0000000
--- a/libc/include/sys/ttychars.h
+++ /dev/null
diff --git a/libc/include/sys/ttydev.h b/libc/include/sys/ttydev.h
deleted file mode 100644
index e69de29..0000000
--- a/libc/include/sys/ttydev.h
+++ /dev/null
diff --git a/libc/include/util.h b/libc/include/util.h
deleted file mode 100644
index e69de29..0000000
--- a/libc/include/util.h
+++ /dev/null