1 files changed, 1 insertions, 0 deletions
diff --git a/eval.c b/eval.c
index 5630d34314..e9f07a61ba 100644
--- a/eval.c
+++ b/eval.c
@@ -9408,6 +9408,7 @@ struct thgroup {
     int gid;
 };
 
+static VALUE thgroup_s_alloc _((VALUE));
 static VALUE
 thgroup_s_alloc(klass)
     VALUE klass;