4 files changed, 12 insertions, 0 deletions
diff --git a/src/os/unix/ngx_freebsd_config.h b/src/os/unix/ngx_freebsd_config.h
index 0bf4fd525..818e230ba 100644
--- a/src/os/unix/ngx_freebsd_config.h
+++ b/src/os/unix/ngx_freebsd_config.h
@@ -77,6 +77,9 @@
 #endif
 
 
+#define NGX_LISTEN_BACKLOG        -1
+
+
 #if (defined SO_ACCEPTFILTER && !defined NGX_HAVE_DEFERRED_ACCEPT)
 #define NGX_HAVE_DEFERRED_ACCEPT  1
 #endif
diff --git a/src/os/unix/ngx_linux_config.h b/src/os/unix/ngx_linux_config.h
index 980e05d67..3e0475ffc 100644
--- a/src/os/unix/ngx_linux_config.h
+++ b/src/os/unix/ngx_linux_config.h
@@ -78,6 +78,9 @@ extern ssize_t sendfile(int s, int fd, int32_t *offset, size_t size);
 #endif
 
 
+#define NGX_LISTEN_BACKLOG        511
+
+
 #if defined TCP_DEFER_ACCEPT && !defined NGX_HAVE_DEFERRED_ACCEPT
 #define NGX_HAVE_DEFERRED_ACCEPT  1
 #endif
diff --git a/src/os/unix/ngx_posix_config.h b/src/os/unix/ngx_posix_config.h
index 8a9509960..f79657654 100644
--- a/src/os/unix/ngx_posix_config.h
+++ b/src/os/unix/ngx_posix_config.h
@@ -88,6 +88,9 @@
 #endif
 
 
+#define NGX_LISTEN_BACKLOG  511
+
+
 #if (__FreeBSD__) && (__FreeBSD_version < 400017)
 
 #include <sys/param.h>          /* ALIGN() */
diff --git a/src/os/unix/ngx_solaris_config.h b/src/os/unix/ngx_solaris_config.h
index 9183bb360..989a30e2c 100644
--- a/src/os/unix/ngx_solaris_config.h
+++ b/src/os/unix/ngx_solaris_config.h
@@ -82,6 +82,9 @@
 #endif
 
 
+#define NGX_LISTEN_BACKLOG           511
+
+
 #ifndef NGX_HAVE_INHERITED_NONBLOCK
 #define NGX_HAVE_INHERITED_NONBLOCK  1
 #endif