diff --git a/ext/imap/tests/bug45705.phpt b/ext/imap/tests/bug45705.phpt
new file mode 100644
index 00000000000..7ba600eee7a
--- /dev/null
+++ b/ext/imap/tests/bug45705.phpt
@@ -0,0 +1,20 @@
+--TEST--
+Bug #45705 (imap_rfc822_parse_adrlist() modifies passed address parameter)
+--SKIPIF--
+<?php
+	if (!extension_loaded("imap")) { 
+		die("skip imap extension not available");  
+	}
+?>
+--FILE--
+<?php
+
+$address = 'John Doe <john@example.com>';
+var_dump($address);
+imap_rfc822_parse_adrlist($address, null);
+var_dump($address);
+
+?>
+--EXPECT--
+string(27) "John Doe <john@example.com>"
+string(27) "John Doe <john@example.com>"