diff -r bef3cc16c064 -r 697562a5da7c stage4/generate_c/search_base_type.cc
--- a/stage4/generate_c/search_base_type.cc	Tue May 19 16:31:35 2009 +0200
+++ b/stage4/generate_c/search_base_type.cc	Mon May 25 12:17:10 2009 +0200
@@ -95,6 +95,14 @@
     void *visit(constant_int_type_name_c *symbol)    {return (void *)symbol;}
     void *visit(constant_real_type_name_c *symbol)    {return (void *)symbol;}
     void *visit(direct_variable_type_name_c *symbol)    {return (void *)symbol;}
+    /******************************************************/
+    /* Extensions to the base standard as defined in      */
+    /* "Safety Software Technical Specification,          */
+    /*  Part 1: Concepts and Function Blocks,             */
+    /*  Version 1.0 – Official Release"                   */
+    /* by PLCopen - Technical Committee 5 - 2006-01-31    */
+    /******************************************************/
+    void *visit(safebool_type_name_c *symbol)	{return (void *)symbol;}
 
 /********************************/
 /* B 1.3.3 - Derived data types */
@@ -225,6 +233,8 @@
 					string_type_declaration_init) // may be == NULL!
 */
     void *visit(string_type_declaration_c *symbol)	{return symbol;}
+
+
 };