diff --git a/ports/sysdeps/unix/sysv/linux/aarch64/configure b/ports/sysdeps/unix/sysv/linux/aarch64/configure
index 5a22126..b806d27 100644
--- a/ports/sysdeps/unix/sysv/linux/aarch64/configure
+++ b/ports/sysdeps/unix/sysv/linux/aarch64/configure
@@ -1,3 +1,22 @@
 # This file is generated from configure.in by Autoconf.  DO NOT EDIT!
+ # Local configure fragment for sysdeps/unix/sysv/linux/aarch64.
 
 arch_minimum_kernel=3.7.0
+
+case "$prefix" in
+/usr | /usr/)
+  # 64-bit libraries on bi-arch platforms go in /lib64 instead of /lib.
+  # Allow earlier configure scripts to handle libc_cv_slibdir, libdir,
+  # and libc_cv_localedir.
+  test -n "$libc_cv_slibdir" ||
+  case $machine in
+  aarch64*)
+    libc_cv_slibdir="/lib64"
+    if test "$libdir" = '${exec_prefix}/lib'; then
+      libdir='${exec_prefix}/lib64';
+      # Locale data can be shared between 32bit and 64bit libraries
+      libc_cv_localedir='${exec_prefix}/lib/locale'
+    fi
+    ;;
+  esac
+esac
diff --git a/ports/sysdeps/unix/sysv/linux/aarch64/configure.in b/ports/sysdeps/unix/sysv/linux/aarch64/configure.in
index d1995d4..e93fb3a 100644
--- a/ports/sysdeps/unix/sysv/linux/aarch64/configure.in
+++ b/ports/sysdeps/unix/sysv/linux/aarch64/configure.in
@@ -2,3 +2,21 @@ GLIBC_PROVIDES dnl See aclocal.m4 in the top level source directory.
 # Local configure fragment for sysdeps/unix/sysv/linux/aarch64.
 
 arch_minimum_kernel=3.7.0
+
+case "$prefix" in
+/usr | /usr/)
+  # 64-bit libraries on bi-arch platforms go in /lib64 instead of /lib.
+  # Allow earlier configure scripts to handle libc_cv_slibdir, libdir,
+  # and libc_cv_localedir.
+  test -n "$libc_cv_slibdir" ||
+  case $machine in
+  aarch64*)
+    libc_cv_slibdir="/lib64"
+    if test "$libdir" = '${exec_prefix}/lib'; then
+      libdir='${exec_prefix}/lib64';
+      # Locale data can be shared between 32bit and 64bit libraries
+      libc_cv_localedir='${exec_prefix}/lib/locale'
+    fi
+    ;;
+  esac
+esac