diff --git a/sources/scalac/symtab/Definitions.java b/sources/scalac/symtab/Definitions.java
index 406fe1e5e..9efd167e7 100644
--- a/sources/scalac/symtab/Definitions.java
+++ b/sources/scalac/symtab/Definitions.java
@@ -656,7 +656,7 @@ public class Definitions {
 	STRING_CLASS = getClass(forMSIL ? "System.String" : "java.lang.String");
         THROWABLE_CLASS =
             getClass(forMSIL ? "System.Exception" : "java.lang.Throwable");
-	SERIALIZABLE_CLASS = getClass(forMSIL ? "System.Serializable" : "java.io.Serializable");
+	SERIALIZABLE_CLASS = getClass("java.io.Serializable");
 
         // the scala value classes
         UNIT_CLASS = getClass("scala.Unit");