1 files changed, 1 insertions, 1 deletions
diff --git a/include/mruby/string.h b/include/mruby/string.h
index ea9ca71ec..d35a5fe53 100644
--- a/include/mruby/string.h
+++ b/include/mruby/string.h
@@ -29,7 +29,7 @@ struct RString {
   long len;
   union {
     size_t capa;
-    mrb_value shared;
+    struct RString *shared;
   } aux;
   char *buf;
 };