diff --git a/src/systemc/core/sc_module.cc b/src/systemc/core/sc_module.cc
index b4fd292..0954ce9 100644
--- a/src/systemc/core/sc_module.cc
+++ b/src/systemc/core/sc_module.cc
@@ -301,6 +301,14 @@
 }
 
 
+bool
+sc_module::timed_out()
+{
+    warn("%s not implemented.\n", __PRETTY_FUNCTION__);
+    return false;
+}
+
+
 void
 sc_module::wait()
 {
@@ -483,6 +491,13 @@
     warn("%s not implemented.\n", __PRETTY_FUNCTION__);
 }
 
+bool
+timed_out()
+{
+    warn("%s not implemented.\n", __PRETTY_FUNCTION__);
+    return false;
+}
+
 
 void
 wait()
diff --git a/src/systemc/core/sc_prim.cc b/src/systemc/core/sc_prim.cc
index 0daf317..4b5cf17 100644
--- a/src/systemc/core/sc_prim.cc
+++ b/src/systemc/core/sc_prim.cc
@@ -134,6 +134,13 @@
     warn("%s not implemented.\n", __PRETTY_FUNCTION__);
 }
 
+bool
+sc_prim_channel::timed_out()
+{
+    warn("%s not implemented.\n", __PRETTY_FUNCTION__);
+    return false;
+}
+
 void
 sc_prim_channel::wait()
 {
diff --git a/src/systemc/ext/core/sc_module.hh b/src/systemc/ext/core/sc_module.hh
index ffb1a3c..7891961 100644
--- a/src/systemc/ext/core/sc_module.hh
+++ b/src/systemc/ext/core/sc_module.hh
@@ -183,6 +183,9 @@
     void next_trigger(const sc_time &, const sc_event_and_list &);
     void next_trigger(double, sc_time_unit, const sc_event_and_list &);
 
+    // Nonstandard
+    bool timed_out();
+
     void wait();
     void wait(int);
     void wait(const sc_event &);
@@ -242,6 +245,9 @@
 void wait(const sc_time &, const sc_event_and_list &);
 void wait(double, sc_time_unit, const sc_event_and_list &);
 
+// Nonstandard
+bool timed_out();
+
 #define SC_MODULE(name) struct name : ::sc_core::sc_module
 
 #define SC_CTOR(name) \
diff --git a/src/systemc/ext/core/sc_prim.hh b/src/systemc/ext/core/sc_prim.hh
index d6265cb..2348f45 100644
--- a/src/systemc/ext/core/sc_prim.hh
+++ b/src/systemc/ext/core/sc_prim.hh
@@ -67,6 +67,9 @@
     void next_trigger(const sc_time &, const sc_event_and_list &);
     void next_trigger(double, sc_time_unit, const sc_event_and_list &);
 
+    // Nonstandard.
+    bool timed_out();
+
     void wait();
     void wait(int);
     void wait(const sc_event &);