diff --git a/man8/ld.so.8 b/man8/ld.so.8
index 77e407c6d..bcefee8f1 100644
--- a/man8/ld.so.8
+++ b/man8/ld.so.8
@@ -251,7 +251,7 @@ LinuxThreads and NPTL
 see
 .BR pthreads (7).
 .TP
-.BR LD_BIND_NOW " (libc5; glibc since 2.1.1)"
+.BR LD_BIND_NOW " (glibc since 2.1.1)"
 If set to a nonempty string,
 causes the dynamic linker to resolve all symbols
 at program startup instead of deferring function call resolution to the point
@@ -329,20 +329,6 @@ instead of running normally.
 Then there are lots of more or less obscure variables,
 many obsolete or only for internal use.
 .TP
-.BR LD_AOUT_LIBRARY_PATH " (libc5)"
-Version of
-.B LD_LIBRARY_PATH
-for a.out binaries only.
-Old versions of ld\-linux.so.1 also supported
-.BR LD_ELF_LIBRARY_PATH .
-.TP
-.BR LD_AOUT_PRELOAD " (libc5)"
-Version of
-.B LD_PRELOAD
-for a.out binaries only.
-Old versions of ld\-linux.so.1 also supported
-.BR LD_ELF_PRELOAD .
-.TP
 .BR LD_AUDIT " (glibc since 2.4)"
 A colon-separated list of user-specified, ELF shared objects
 to be loaded before all others in a separate linker namespace
@@ -447,14 +433,6 @@ is ignored in secure-execution mode.
 .BR LD_HWCAP_MASK " (glibc since 2.1)"
 Mask for hardware capabilities.
 .TP
-.BR LD_KEEPDIR " (a.out only; libc5)"
-Don't ignore the directory in the names of a.out libraries to be loaded.
-Use of this option is strongly discouraged.
-.TP
-.BR LD_NOWARN " (a.out only; libc5)"
-Suppress warnings about a.out libraries with incompatible minor
-version numbers.
-.TP
 .BR LD_ORIGIN_PATH " (glibc since 2.1)"
 Path where the binary is found.
 Since glibc 2.4,
@@ -562,12 +540,6 @@ reduces the address range available for address space layout
 randomization (ASLR),
 .B LD_PREFER_MAP_32BIT_EXEC
 is always disabled in secure-execution mode.
-.TP
-.BR LDD_ARGV0 " (libc5)"
-.IR argv [0]
-to be used by
-.BR ldd (1)
-when none is present.
 .SH FILES
 .PD 0
 .TP