diff -r 9e8e1ba5ca46 -r 8b2a31dea131 stage4/generate_c/generate_c_st.cc
--- a/stage4/generate_c/generate_c_st.cc	Sun Jul 06 23:31:08 2014 +0100
+++ b/stage4/generate_c/generate_c_st.cc	Sun Jul 13 12:26:58 2014 +0100
@@ -464,7 +464,8 @@
 /* B 3.1 - Expressions */
 /***********************/
 void *visit(ref_expression_c *symbol) {
-  s4o.print("((IEC_UDINT)");  
+  s4o.print("(");  
+  s4o.print("(IEC_UDINT)");  
   if (this->is_variable_prefix_null()) {  
     /* For code in FUNCTIONs */
     s4o.print("&(");