1 files changed, 1 insertions, 1 deletions
diff --git a/thread.c b/thread.c
index ae0daa5d50..2f02cc3ca0 100644
--- a/thread.c
+++ b/thread.c
@@ -2464,7 +2464,7 @@ thgroup_list(VALUE group)
  *     ThreadError: can't move from the enclosed thread group
  */
 
-VALUE
+static VALUE
 thgroup_enclose(VALUE group)
 {
     struct thgroup *data;