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-rw-r--r--src/makeint.h4
1 files changed, 3 insertions, 1 deletions
diff --git a/src/makeint.h b/src/makeint.h
index 1e1596d2..085a4ea8 100644
--- a/src/makeint.h
+++ b/src/makeint.h
@@ -393,7 +393,9 @@ extern int unixy_shell;
# endif
/* Include only the minimal stuff from windows.h. */
-# define WIN32_LEAN_AND_MEAN
+# ifndef WIN32_LEAN_AND_MEAN
+# define WIN32_LEAN_AND_MEAN
+# endif
#endif /* WINDOWS32 */
/* ALL_SET() evaluates the second argument twice. */