diff --git a/src/Scripting/NasalSys.cxx b/src/Scripting/NasalSys.cxx
index d37857cec..1f9ac8879 100644
--- a/src/Scripting/NasalSys.cxx
+++ b/src/Scripting/NasalSys.cxx
@@ -656,11 +656,9 @@ naRef FGNasalSys::setListener(int argc, naRef* args)
     else if(naIsGhost(prop)) node = *(SGPropertyNode_ptr*)naGhost_ptr(prop);
     else return naNil();
 
-    if (node->isTied()) {
-        naRuntimeError(_context, "cannot attach listener to tied property %s",
+    if (node->isTied())
+        SG_LOG(SG_NASAL, SG_DEBUG, "Attaching listener to tied property " <<
                 node->getPath());
-        return naNil();
-    }
 
     naRef handler = argc > 1 ? args[1] : naNil();
     if(!(naIsCode(handler) || naIsCCode(handler) || naIsFunc(handler)))