--- open-invaders-0.3.old/src/main.cc
+++ open-invaders-0.3/src/main.cc
@@ -98,7 +98,10 @@
 
 	cout << "Have fun!\n";
 	
-	intro_sequence();  // This is a self-contained block, all within intro.cc (I hope!)
+#ifdef NOTDEF                   // Not presently used
+    intro_sequence();           // Self-contained block, all within
+                                // intro.cc (I hope!)
+#endif                          // Endif NOTDEF
 	
 	// The program now continues to run as long as program_active is true.