1 files changed, 3 insertions, 1 deletions
diff --git a/src/gc.c b/src/gc.c
index 03428765c..cce35efa4 100644
--- a/src/gc.c
+++ b/src/gc.c
@@ -460,7 +460,9 @@ obj_free(mrb_state *mrb, struct RBasic *obj)
     break;
 
   case MRB_TT_STRING:
-    if (!(obj->flags & MRB_STR_SHARED))
+    if (obj->flags & MRB_STR_SHARED)
+      mrb_str_decref(mrb, ((struct RString*)obj)->aux.shared);
+    else
       mrb_free(mrb, ((struct RString*)obj)->buf);
     break;