1 files changed, 1 insertions, 1 deletions
diff --git a/src/string.c b/src/string.c
index 6424626d2..719be3ff5 100644
--- a/src/string.c
+++ b/src/string.c
@@ -2361,7 +2361,7 @@ mrb_str_dump(mrb_state *mrb, mrb_value str)
         }
     }
   }
-  *q++ = '"';
+  *q = '"';
   return mrb_obj_value(result);
 }