diff --git a/pyembed/src/config.rs b/pyembed/src/config.rs
index 1203a60fe..600263050 100644
--- a/pyembed/src/config.rs
+++ b/pyembed/src/config.rs
@@ -680,13 +680,13 @@ impl<'a> From<PythonConfig<'a>> for OxidizedPythonInterpreterConfig<'a> {
                 }),
                 site_import: Some(config.import_site),
                 user_site_directory: Some(config.import_user_site),
-                use_environment: Some(!config.ignore_python_env),
+                use_environment: Some(config.ignore_python_env),
                 inspect: Some(config.inspect),
                 interactive: Some(config.interactive),
                 legacy_windows_fs_encoding: Some(config.legacy_windows_stdio),
                 legacy_windows_stdio: Some(config.legacy_windows_stdio),
                 write_bytecode: Some(config.write_bytecode),
-                buffered_stdio: Some(!config.unbuffered_stdio),
+                buffered_stdio: Some(config.unbuffered_stdio),
                 parser_debug: Some(config.parser_debug),
                 quiet: Some(config.quiet),
                 verbose: Some(config.verbose != 0),