diff --git a/ext/objspace/objspace_dump.c b/ext/objspace/objspace_dump.c
index 35a7282500..f81855c148 100644
--- a/ext/objspace/objspace_dump.c
+++ b/ext/objspace/objspace_dump.c
@@ -191,6 +191,7 @@ dump_append_string_value(struct dump_config *dc, VALUE obj)
         switch ((c = value[i])) {
           case '\\':
             dump_append(dc, "\\\\");
+            break;
           case '"':
             dump_append(dc, "\\\"");
             break;