diff --git a/command/agent/check.go b/command/agent/check.go
index 352c986fe3..ef0eea3ad1 100644
--- a/command/agent/check.go
+++ b/command/agent/check.go
@@ -325,6 +325,7 @@ func (c *CheckHTTP) run() {
 			c.check()
 			next = time.After(c.Interval)
 		case <-c.stopCh:
+			http.DefaultTransport.(*http.Transport).CloseIdleConnections()
 			return
 		}
 	}