1 files changed, 2 insertions, 4 deletions
diff --git a/string.c b/string.c
index efa817ea43..454959abc0 100644
--- a/string.c
+++ b/string.c
@@ -2075,10 +2075,7 @@ str_gsub(argc, argv, str, bang)
     }
 
     blen = RSTRING(str)->len + 30; /* len + margin */
-    dest = rb_str_new5(str, 0, blen);
-    if (bang) {
-	RBASIC(dest)->klass = 0;
-    }
+    dest = str_new(0, 0, blen);
     buf = RSTRING(dest)->ptr;
     bp = buf;
     sp = cp = RSTRING(str)->ptr;
@@ -2158,6 +2155,7 @@ str_gsub(argc, argv, str, bang)
 	RSTRING(dest)->len = 0;
     }
     else {
+	RBASIC(dest)->klass = rb_obj_class(str);
 	OBJ_INFECT(dest, str);
 	str = dest;
     }