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-rw-r--r--sys/sys/umtx.h2
1 files changed, 1 insertions, 1 deletions
diff --git a/sys/sys/umtx.h b/sys/sys/umtx.h
index 3156b22..b0d796d 100644
--- a/sys/sys/umtx.h
+++ b/sys/sys/umtx.h
@@ -47,7 +47,7 @@ struct umtx {
#define USYNC_PROCESS_SHARED 0x0001 /* Process shared sync objs */
#define UMUTEX_UNOWNED 0x0
-#define UMUTEX_CONTESTED 0x80000000
+#define UMUTEX_CONTESTED 0x80000000U
#define UMUTEX_ERROR_CHECK 0x0002 /* Error-checking mutex */
#define UMUTEX_PRIO_INHERIT 0x0004 /* Priority inherited mutex */
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