diff --git a/src/libbson b/src/libbson
index 01f21fee7..ac20e7223 160000
--- a/src/libbson
+++ b/src/libbson
@@ -1 +1 @@
-Subproject commit 01f21fee773177a95c830c3c82ec6dfd7b871429
+Subproject commit ac20e7223e8e6a02cbe1fb41740382fc59635b4d
diff --git a/tests/bson/bug1067.phpt b/tests/bson/bug1067.phpt
new file mode 100644
index 000000000..24dfd6194
--- /dev/null
+++ b/tests/bson/bug1067.phpt
@@ -0,0 +1,16 @@
+--TEST--
+PHPC-1067: BSON document produces driver segfault with insert
+--FILE--
+<?php
+$x = [
+    '_______'                             => new MongoDB\BSON\ObjectID('111111111111111111111111'),
+    '___________________________________' => new MongoDB\BSON\Regex('_______________________________________________________', 'i'),
+];
+ 
+$bulk = new MongoDB\Driver\BulkWrite;
+$bulk->insert($x);
+?>
+==DONE==
+<?php exit(0); ?>
+--EXPECT--
+==DONE==