diff --git a/scapy/modules/nmap.py b/scapy/modules/nmap.py
index 692e0730ecc2ed1325179bcc5e77cc014f542656..ffed334a63a80918f7e90391c4afa56b902677fa 100644
--- a/scapy/modules/nmap.py
+++ b/scapy/modules/nmap.py
@@ -3,10 +3,17 @@
 ## Copyright (C) Philippe Biondi <phil@secdev.org>
 ## This program is published under a GPLv2 license
 
+import os
+
 from scapy.data import KnowledgeBase
 from scapy.config import conf
+from scapy.arch import WINDOWS
+
 
-conf.nmap_base ="/usr/share/nmap/nmap-os-fingerprints"
+if WINDOWS:
+    conf.nmap_base=os.environ["ProgramFiles"] + "\\nmap\\nmap-os-fingerprints"
+else:
+    conf.nmap_base ="/usr/share/nmap/nmap-os-fingerprints"
 
 
 ######################