diff -r 8ba9ec4bae50 -r bd1360f29f15 stage3/constant_folding.hh
--- a/stage3/constant_folding.hh	Thu Oct 04 14:30:51 2012 +0100
+++ b/stage3/constant_folding.hh	Thu Oct 04 15:10:45 2012 +0100
@@ -81,6 +81,11 @@
     void *visit(boolean_true_c *symbol);
     void *visit(boolean_false_c *symbol);
 
+    /************************/
+    /* B 1.2.3.1 - Duration */
+    /********* **************/
+    void *visit(fixed_point_c *symbol);
+
     /****************************************/
     /* B.2 - Language IL (Instruction List) */
     /****************************************/