diff --git a/proc.c b/proc.c
index f350942101..d72e1a9254 100644
--- a/proc.c
+++ b/proc.c
@@ -1207,6 +1207,14 @@ proc_hash(VALUE self)
  * an indication of where the proc was defined.
  */
 
+static VALUE
+proc_to_s(VALUE self)
+{
+    const rb_proc_t *proc;
+    GetProcPtr(self, proc);
+    return proc_to_s_(self, proc);
+}
+
 static VALUE
 proc_to_s_(VALUE self, const rb_proc_t *proc)
 {
@@ -1250,14 +1258,6 @@ proc_to_s_(VALUE self, const rb_proc_t *proc)
     return str;
 }
 
-static VALUE
-proc_to_s(VALUE self)
-{
-    const rb_proc_t *proc;
-    GetProcPtr(self, proc);
-    return proc_to_s_(self, proc);
-}
-
 /*
  *  call-seq:
  *     prc.to_proc -> proc