diff --git a/src/core/ngx_conf_file.h b/src/core/ngx_conf_file.h
index 17c24c7..7d51129 100644
--- a/src/core/ngx_conf_file.h
+++ b/src/core/ngx_conf_file.h
@@ -236,8 +236,8 @@
         conf = default;                                                      \
     }
 
-#define ngx_conf_init_unsigned_value(conf, default)                          \
-    if (conf == (unsigned) NGX_CONF_UNSET) {                                 \
+#define ngx_conf_init_uint_value(conf, default)                              \
+    if (conf == NGX_CONF_UNSET_UINT) {                                       \
         conf = default;                                                      \
     }
 
@@ -261,7 +261,7 @@
         conf = (prev == NULL) ? default : prev;                              \
     }
 
-#define ngx_conf_merge_unsigned_value(conf, prev, default)                   \
+#define ngx_conf_merge_uint_value(conf, prev, default)                       \
     if (conf == NGX_CONF_UNSET_UINT) {                                       \
         conf = (prev == NGX_CONF_UNSET_UINT) ? default : prev;               \
     }
@@ -281,6 +281,11 @@
         conf = (prev == NGX_CONF_UNSET_SIZE) ? default : prev;               \
     }
 
+#define ngx_conf_merge_off_value(conf, prev, default)                        \
+    if (conf == NGX_CONF_UNSET) {                                            \
+        conf = (prev == NGX_CONF_UNSET) ? default : prev;                    \
+    }
+
 #define ngx_conf_merge_str_value(conf, prev, default)                        \
     if (conf.data == NULL) {                                                 \
         if (prev.data) {                                                     \
@@ -328,6 +333,7 @@
 char *ngx_conf_set_keyval_slot(ngx_conf_t *cf, ngx_command_t *cmd, void *conf);
 char *ngx_conf_set_num_slot(ngx_conf_t *cf, ngx_command_t *cmd, void *conf);
 char *ngx_conf_set_size_slot(ngx_conf_t *cf, ngx_command_t *cmd, void *conf);
+char *ngx_conf_set_off_slot(ngx_conf_t *cf, ngx_command_t *cmd, void *conf);
 char *ngx_conf_set_msec_slot(ngx_conf_t *cf, ngx_command_t *cmd, void *conf);
 char *ngx_conf_set_sec_slot(ngx_conf_t *cf, ngx_command_t *cmd, void *conf);
 char *ngx_conf_set_bufs_slot(ngx_conf_t *cf, ngx_command_t *cmd, void *conf);