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Diffstat (limited to 'src/os/win32/ngx_atomic.h')
-rw-r--r--src/os/win32/ngx_atomic.h3
1 files changed, 2 insertions, 1 deletions
diff --git a/src/os/win32/ngx_atomic.h b/src/os/win32/ngx_atomic.h
index 1e3334548..8003b740f 100644
--- a/src/os/win32/ngx_atomic.h
+++ b/src/os/win32/ngx_atomic.h
@@ -25,7 +25,8 @@ typedef volatile ngx_atomic_uint_t ngx_atomic_t;
/* the new SDK headers */
#define ngx_atomic_cmp_set(lock, old, set) \
- (InterlockedCompareExchange((long *) lock, set, old) == old)
+ ((ngx_atomic_uint_t) InterlockedCompareExchange((long *) lock, set, old) \
+ == old)
#else