1 files changed, 1 insertions, 1 deletions
diff --git a/string.c b/string.c
index 98dbbfb645..4114f2d8b5 100644
--- a/string.c
+++ b/string.c
@@ -140,7 +140,7 @@ rb_fstring(VALUE str)
 	str = (VALUE)fstr;
 	/* because of lazy sweep, str may be unmaked already and swept
 	 * at next time */
-	rb_gc_mark(str);
+	rb_gc_resurrect(str);
     }
     else {
 	str = rb_str_new_frozen(str);