Index: src/PrimitiveFunction.hh
===================================================================
--- src/PrimitiveFunction.hh	(revision 346)
+++ src/PrimitiveFunction.hh	(working copy)
@@ -775,6 +775,10 @@
    : NonscalarFunction(TOK_F2_RIGHT)
    {}
 
+   /// Overloaded Function::eval_B()
+   virtual Token eval_B(Value_P B)
+      { return Token(TOK_APL_VALUE1, B->clone(LOC)); }
+
    /// Overloaded Function::eval_AB()
    virtual Token eval_AB(Value_P A, Value_P B)
       { return Token(TOK_APL_VALUE1, B->clone(LOC)); }