diff --git a/Lib/distutils/command/build_clib.py b/Lib/distutils/command/build_clib.py
index 258d7c10be4..428011a64dc 100644
--- a/Lib/distutils/command/build_clib.py
+++ b/Lib/distutils/command/build_clib.py
@@ -32,9 +32,9 @@ class build_clib(Command):
     description = "build C/C++ libraries used by Python extensions"
 
     user_options = [
-        ('build-clib', 'b',
+        ('build-clib=', 'b',
          "directory to build C/C++ libraries to"),
-        ('build-temp', 't',
+        ('build-temp=', 't',
          "directory to put temporary build by-products"),
         ('debug', 'g',
          "compile with debugging information"),