1 files changed, 3 insertions, 2 deletions
diff --git a/enum.c b/enum.c
index 8dd24514b5..e977dedd76 100644
--- a/enum.c
+++ b/enum.c
@@ -944,8 +944,9 @@ enum_sort_by(VALUE obj)
 	rb_ary_concat(ary, buf);
     }
     if (RARRAY_LEN(ary) > 2) {
-	ruby_qsort(RARRAY_PTR(ary), RARRAY_LEN(ary)/2, 2*sizeof(VALUE),
-		   sort_by_cmp, (void *)ary);
+	RARRAY_PTR_USE(ary, ptr,
+		      ruby_qsort(ptr, RARRAY_LEN(ary)/2, 2*sizeof(VALUE),
+				 sort_by_cmp, (void *)ary));
     }
     if (RBASIC(ary)->klass) {
 	rb_raise(rb_eRuntimeError, "sort_by reentered");