diff --git a/scapy/arch/windows/__init__.py b/scapy/arch/windows/__init__.py
index 295effa5b..44981e822 100755
--- a/scapy/arch/windows/__init__.py
+++ b/scapy/arch/windows/__init__.py
@@ -242,7 +242,7 @@ class WinProgPath(ConfClass):
                                env="SystemRoot")
         if self.wireshark:
             manu_path = load_manuf(os.path.sep.join(self.wireshark.split(os.path.sep)[:-1])+os.path.sep+"manuf")
-            scapy.data.MANUFDB = conf.manufdb = MANUFDB = manu_path
+            scapy.data.MANUFDB = conf.manufdb = manu_path
         
         self.os_access = (self.powershell is not None) or (self.cscript is not None)
 
diff --git a/test/regression.uts b/test/regression.uts
index 01d149119..5f068a6f1 100644
--- a/test/regression.uts
+++ b/test/regression.uts
@@ -331,8 +331,8 @@ if not WINDOWS:
 
 = Test manuf DB methods
 ~ manufdb
-assert(MANUFDB._resolve_MAC("00:00:0F:01:02:03") == "Next:01:02:03")
-assert(MANUFDB._get_short_manuf("00:00:0F:01:02:03") == "Next")
+assert(conf.manufdb._resolve_MAC("00:00:0F:01:02:03") == "Next:01:02:03")
+assert(conf.manufdb._get_short_manuf("00:00:0F:01:02:03") == "Next")
 assert(in6_addrtovendor("fe80::0200:0fff:fe01:0203").lower().startswith("next"))
 
 = Test utility functions - network related