1 files changed, 1 insertions, 1 deletions
diff --git a/eval.c b/eval.c
index fdf0de938e..7339690b73 100644
--- a/eval.c
+++ b/eval.c
@@ -12586,7 +12586,7 @@ thgroup_list(VALUE group)
  *     ThreadError: can't move from the enclosed thread group
  */
 
-VALUE
+static VALUE
 thgroup_enclose(VALUE group)
 {
     struct thgroup *data;