diff --git a/trick_source/codegen/Interface_Code_Gen/ConstructValues.cpp b/trick_source/codegen/Interface_Code_Gen/ConstructValues.cpp
index 6fae28f3..370779e5 100644
--- a/trick_source/codegen/Interface_Code_Gen/ConstructValues.cpp
+++ b/trick_source/codegen/Interface_Code_Gen/ConstructValues.cpp
@@ -70,6 +70,7 @@ static void mangle_template_param(std::string &work_string, const std::string &
         std::replace( work_string.begin(), work_string.end(), '*', '_') ;
         std::replace( work_string.begin(), work_string.end(), '[', '_') ;
         std::replace( work_string.begin(), work_string.end(), ']', '_') ;
+        std::replace( work_string.begin(), work_string.end(), ':', '_') ;
         work_string.erase(std::remove_if(work_string.begin(), work_string.end(),
         (int(*)(int))std::isspace), work_string.end()) ;
     }