diff --git a/build.vc10/mpir_config.py b/build.vc10/mpir_config.py
index 289069cd..88abdf14 100644
--- a/build.vc10/mpir_config.py
+++ b/build.vc10/mpir_config.py
@@ -38,7 +38,7 @@ from re import compile, search, ASCII
 # either add a prebuild step to the project files or do it here
 add_prebuild = True
 # output a build project for the C++ static library 
-add_cpp_lib = True
+add_cpp_lib = False
 
 # The path to the mpir root directory
 build_vc = 'build.vc10/'