diff --git a/waflib/Configure.py b/waflib/Configure.py
index 6d5f3fb7..1433336d 100644
--- a/waflib/Configure.py
+++ b/waflib/Configure.py
@@ -212,12 +212,12 @@ class ConfigurationContext(Context.Context):
 			else:
 				env.PREFIX = ''
 		if not env.BINDIR:
-			if Options.options.bindir or Utils.is_win32:
+			if Options.options.bindir:
 				env.BINDIR = os.path.abspath(os.path.expanduser(Options.options.bindir))
 			else:
 				env.BINDIR = Utils.subst_vars('${PREFIX}/bin', env)
 		if not env.LIBDIR:
-			if Options.options.libdir or Utils.is_win32:
+			if Options.options.libdir:
 				env.LIBDIR = os.path.abspath(os.path.expanduser(Options.options.libdir))
 			else:
 				env.LIBDIR = Utils.subst_vars('${PREFIX}/lib%s' % Utils.lib64(), env)