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-rw-r--r--winsup/cygwin/wincap.cc1
1 files changed, 1 insertions, 0 deletions
diff --git a/winsup/cygwin/wincap.cc b/winsup/cygwin/wincap.cc
index cb52aad6f..c8799f3ec 100644
--- a/winsup/cygwin/wincap.cc
+++ b/winsup/cygwin/wincap.cc
@@ -118,6 +118,7 @@ wincapc::init ()
RtlGetNtVersionNumbers (&version.dwMajorVersion,
&version.dwMinorVersion,
&version.dwBuildNumber);
+ version.dwBuildNumber &= 0xffff;
switch (version.dwMajorVersion)
{