diff --git a/pipreqs/mapping b/pipreqs/mapping
index 6f5a469..7eb67dc 100644
--- a/pipreqs/mapping
+++ b/pipreqs/mapping
@@ -13,6 +13,7 @@ Crypto:pycryptodome
 Cryptodome:pycryptodomex
 FSM:pexpect
 FiftyOneDegrees:51degrees_mobile_detector_v3_wrapper
+functional:pyfunctional
 GeoBaseMain:GeoBasesDev
 GeoBases:GeoBasesDev
 Globals:Zope2