diff --git a/src/util/cgroup.c b/src/util/cgroup.c
index e6f027059a69033e2943ac2c00bb74bfc427f009..4446c7f1ea86c6f3154b40544a507690add3b3e1 100644
--- a/src/util/cgroup.c
+++ b/src/util/cgroup.c
@@ -183,6 +183,7 @@ static int virCgroupDetectPlacement(virCgroupPtr group)
     return 0;
 
 no_memory:
+    fclose(mapping);
     return -ENOMEM;
 
 }