diff --git a/indra/newview/viewer_manifest.py b/indra/newview/viewer_manifest.py
index 894d2f09251fcc2fd6113c03c68ac325916b644e..027bdbfb30b863a7e1a4888aed94fc70e0ad2d4c 100644
--- a/indra/newview/viewer_manifest.py
+++ b/indra/newview/viewer_manifest.py
@@ -404,11 +404,9 @@ def construct(self):
             self.path("libhunspell.dll")
 
             # For google-perftools tcmalloc allocator.
+            # no longer used, make sure old .dll is removed
             try:
-                if self.args['configuration'].lower() == 'debug':
-                    self.path('libtcmalloc_minimal-debug.dll')
-                else:
-                    self.path('libtcmalloc_minimal.dll')
+                self.remove('libtcmalloc_minimal.dll')
             except:
                 print "Skipping libtcmalloc_minimal.dll"