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-rw-r--r--src/core/ngx_core.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/src/core/ngx_core.h b/src/core/ngx_core.h
index adab5018c..8170f858d 100644
--- a/src/core/ngx_core.h
+++ b/src/core/ngx_core.h
@@ -8,6 +8,7 @@
#define NGX_AGAIN -2
#define NGX_WAITING -3
#define NGX_DECLINED -4
+#define NGX_ALERT -5
#define NGX_MAXHOSTNAMELEN 32