diff --git a/include/boost/python/detail/wrap_python.hpp b/include/boost/python/detail/wrap_python.hpp
index 88597b58..af76fcce 100644
--- a/include/boost/python/detail/wrap_python.hpp
+++ b/include/boost/python/detail/wrap_python.hpp
@@ -51,6 +51,7 @@
 # if defined(_SGI_COMPILER_VERSION) && _SGI_COMPILER_VERSION >= 740
 #  undef _POSIX_C_SOURCE
 #  undef _XOPEN_SOURCE
+#  undef HAVE_STDINT_H // undo Python 2.5.1 define
 # endif
 
 //