diff --git a/src/systemc/ext/utils/sc_exception.hh b/src/systemc/ext/utils/sc_exception.hh
index 3bd8fb0..8e02ea9 100644
--- a/src/systemc/ext/utils/sc_exception.hh
+++ b/src/systemc/ext/utils/sc_exception.hh
@@ -37,6 +37,14 @@
 
 typedef std::exception sc_exception;
 
+// Nonstandard
+class sc_user
+{
+  public:
+    sc_user() {}
+    sc_user(const sc_user &) {}
+};
+
 } // namespace sc_core
 
 #endif  //__SYSTEMC_EXT_UTIL_SC_EXCEPTION_HH__