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-rw-r--r--intl/icu/source/common/umutex.h2
1 files changed, 2 insertions, 0 deletions
diff --git a/intl/icu/source/common/umutex.h b/intl/icu/source/common/umutex.h
index e26ac3555..f13da130c 100644
--- a/intl/icu/source/common/umutex.h
+++ b/intl/icu/source/common/umutex.h
@@ -333,7 +333,9 @@ U_NAMESPACE_END
* win32 APIs for Critical Sections.
*/
+# ifndef WIN32_LEAN_AND_MEAN
# define WIN32_LEAN_AND_MEAN
+# endif
# define VC_EXTRALEAN
# define NOUSER
# define NOSERVICE