diff -r c957f712ef4d -r f4a2d400ddbd stage3/narrow_candidate_datatypes.hh
--- a/stage3/narrow_candidate_datatypes.hh	Thu Feb 02 16:50:12 2012 +0000
+++ b/stage3/narrow_candidate_datatypes.hh	Fri Feb 03 10:54:35 2012 +0000
@@ -196,6 +196,11 @@
     /*********************************/
     void *visit(assignment_statement_c *symbol);
 
+    /*****************************************/
+    /* B 3.2.2 Subprogram Control Statements */
+    /*****************************************/
+    void *visit(fb_invocation_c *symbol);
+    
     /********************************/
     /* B 3.2.3 Selection Statements */
     /********************************/