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-rw-r--r--src/core/ngx_buf.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/src/core/ngx_buf.h b/src/core/ngx_buf.h
index 1927ed415..feaad4c96 100644
--- a/src/core/ngx_buf.h
+++ b/src/core/ngx_buf.h
@@ -132,6 +132,7 @@ typedef struct {
#define NGX_CHAIN_ERROR (ngx_chain_t *) NGX_ERROR
+#define NGX_CHAIN_AGAIN (ngx_chain_t *) NGX_AGAIN
#define ngx_buf_in_memory(b) (b->temporary || b->memory || b->mmap)