diff --git a/dtool/Config.pp b/dtool/Config.pp
index 03ffa18e91..d9cf7b4991 100644
--- a/dtool/Config.pp
+++ b/dtool/Config.pp
@@ -175,7 +175,7 @@
 // directory (presumably so you can develop them and make changes
 // without having to reinstall), comment out this definition and put
 // your source directory on your PYTHONPATH.
-#define INSTALL_PYTHON_SOURCE 1
+//#define INSTALL_PYTHON_SOURCE 1
 
 // Do you want to enable the "in_interpreter" global variable?  This
 // will enable some callbacks, particularly the MemoryUsage object, to