diff --git a/lib/resty/healthcheck.lua b/lib/resty/healthcheck.lua
index a9d5c2aa..87600ced 100644
--- a/lib/resty/healthcheck.lua
+++ b/lib/resty/healthcheck.lua
@@ -987,7 +987,7 @@ function checker:run_single_check(ip, port, hostname, hostheader)
       if #headers > 0 then
         headers = headers .. "\r\n"
       end
-    end    
+    end
     self.checks.active._headers_str = headers or ""
   end