1 files changed, 4 insertions, 1 deletions
diff --git a/src/http/ngx_http_log_handler.c b/src/http/ngx_http_log_handler.c
index d4f906f1a..722b9f806 100644
--- a/src/http/ngx_http_log_handler.c
+++ b/src/http/ngx_http_log_handler.c
@@ -859,7 +859,10 @@ static char *ngx_http_log_set_log(ngx_conf_t *cf, ngx_command_t *cmd,
         }
     }
 
-    return NGX_CONF_OK;
+    ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
+                       "unknown log format \"%V\"", &name);
+
+    return NGX_CONF_ERROR;
 }