--- a/ImmutableString.st	Thu Mar 14 21:54:03 2019 +0100
+++ b/ImmutableString.st	Fri Mar 15 13:27:25 2019 +0100
@@ -124,7 +124,9 @@
 asMutableCollection
     "return a writable copy of myself"
 
-    ^ self copy changeClassTo:String
+    ^ self copyFrom:1.  "/ #copyFrom: always raturns a String
+
+    "Modified (comment): / 15-03-2019 / 13:26:43 / Stefan Vogel"
 !
 
 beImmutable