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-rw-r--r--src/os/unix/ngx_atomic.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/src/os/unix/ngx_atomic.h b/src/os/unix/ngx_atomic.h
index 39b3e6b7f..57826ffcf 100644
--- a/src/os/unix/ngx_atomic.h
+++ b/src/os/unix/ngx_atomic.h
@@ -14,6 +14,7 @@
#if (NGX_HAVE_LIBATOMIC)
+#define AO_REQUIRE_CAS
#include <atomic_ops.h>
#define NGX_HAVE_ATOMIC_OPS 1