diff -r a0518971127d -r ef3347dbfa0c stage4/generate_c/generate_c_st.cc
--- a/stage4/generate_c/generate_c_st.cc	Sun Jul 13 13:47:16 2014 +0100
+++ b/stage4/generate_c/generate_c_st.cc	Sun Jul 13 17:25:20 2014 +0100
@@ -465,7 +465,6 @@
 /***********************/
 void *visit(ref_expression_c *symbol) {
   s4o.print("(");  
-  s4o.print("(IEC_UDINT)");  
   if (this->is_variable_prefix_null()) {  
     /* For code in FUNCTIONs */
     s4o.print("&(");