--- a/graal/com.oracle.truffle.sl/src/com/oracle/truffle/sl/builtins/SLDefineFunctionBuiltin.java	Wed Feb 12 10:25:29 2014 -0800
+++ b/graal/com.oracle.truffle.sl/src/com/oracle/truffle/sl/builtins/SLDefineFunctionBuiltin.java	Wed Feb 12 10:30:42 2014 -0800
@@ -38,14 +38,14 @@
 
     @Specialization
     public String defineFunction(String code) {
-        return doDefineFunction(getContext(), code);
+        doDefineFunction(getContext(), code);
+        return code;
     }
 
     @SlowPath
-    private static String doDefineFunction(SLContext context, String code) {
+    private static void doDefineFunction(SLContext context, String code) {
         Source source = context.getSourceManager().get("[defineFunction]", code);
         /* The same parsing code as for parsing the initial source. */
         Parser.parseSL(context, source);
-        return code;
     }
 }