diff --git a/src/engine/SCons/Node/FS.py b/src/engine/SCons/Node/FS.py
index 77c340f2..3fc2261d 100644
--- a/src/engine/SCons/Node/FS.py
+++ b/src/engine/SCons/Node/FS.py
@@ -3338,15 +3338,15 @@ class File(Base):

         # First try the simple name for node
         c_str = str(self)
-        if os.altsep:
-            c_str = c_str.replace(os.sep, os.altsep)
+        # if os.altsep:
+        #     c_str = c_str.replace(os.sep, os.altsep)
         df = dmap.get(c_str, None)
         if not df:
             try:
                 # this should yield a path which matches what's in the sconsign
                 c_str = self.get_path()
-                if os.altsep:
-                    c_str = c_str.replace(os.sep, os.altsep)
+                # if os.altsep:
+                #     c_str = c_str.replace(os.sep, os.altsep)

                 df = dmap.get(c_str, None)