diff --git a/23-lmdb.sh b/23-lmdb.sh
new file mode 100644
index 0000000..7f163ea
--- /dev/null
+++ b/23-lmdb.sh
@@ -0,0 +1,44 @@
+#!/bin/bash
+
+if [ "`whoami`" == "root" ]; then
+  echo "Danger, Will Robinson!"
+  echo "Do not execute me as r00t"
+  exit 1
+fi
+
+TARBALL="LMDB_0.9.31.tar.gz"
+DNL="https://github.com/LMDB/lmdb/archive/LMDB_0.9.31.tar.gz"
+SHA256="dd70a8c67807b3b8532b3e987b0a4e998962ecc28643e1af5ec77696b081c9b0"
+
+[ -d lmdb-LMDB_0.9.31 ] && rm -rf lmdb-LMDB_0.9.31
+
+if [ ! -f ${TARBALL} ]; then
+  wget ${DNL}
+  if [ $? -ne 0 ]; then
+    echo "Could not retrieve ${DNL}"
+    echo "Sorry."
+    exit 1
+  fi
+fi
+
+CHECK="`sha256sum ${TARBALL} |awk ' { print $1 } ' `"
+if [ "${CHECK}" != "${SHA256}" ]; then
+  echo "${TARBALL} does not match expected SHA256. Sorry."
+  exit 1
+fi
+
+tar -zxf ${TARBALL} && cd lmdb-LMDB_0.9.31
+
+cd libraries/liblmdb
+make
+if [ $? -ne 0 ]; then
+  echo "Failed building LMDB. Sorry."
+  exit 1
+fi
+sed -i 's| liblmdb.a||' Makefile
+
+echo
+echo "As the root user:"
+echo
+echo "  cd lmdb-LMDB_0.9.31/libraries/liblmdb"
+echo "  make prefix=/usr install"
diff --git a/README.md b/README.md
index 40bc468..e9afc75 100644
--- a/README.md
+++ b/README.md
@@ -215,4 +215,12 @@ Runtime requires make-ca.
 * Status: Script Untested
 * Note: Note yet built with DANE support, or Trousers support.
 
+Dependency Twenty-Three: LMDB
+-----------------------------
+
+Justification: Needed for Cyrus SASL. No build dependencies outside of LFS.
+
+* Script: [`23-lmdb.sh`](23-lmdb.sh)
+* Status: Script Untested
+