diff --git a/tools/xenmon/xenbaked.c b/tools/xenmon/xenbaked.c
index eacacb071c..782f0c1fd1 100644
--- a/tools/xenmon/xenbaked.c
+++ b/tools/xenmon/xenbaked.c
@@ -689,6 +689,7 @@ static void alloc_qos_data(int ncpu)
         cpu_qos_data[n] = new_qos;
     }
     free(dummy);
+    close(qos_fd);
     new_qos = NULL;
 }