diff --git a/pppc.cc b/pppc.cc
index 294cdc1..56ca161 100644
--- a/pppc.cc
+++ b/pppc.cc
@@ -41,6 +41,11 @@ int WinMain(
         }
     }
 
+    if (config_file == NULL)
+    {
+        config_file = "pppc.ini";
+    }
+
     PPPC myPPPC(hInstance, config_file);
 
     return myPPPC.mainLoop();