diff --git a/Python/pathconfig.c b/Python/pathconfig.c
index d5b8b1a..41ef7d2 100644
--- a/Python/pathconfig.c
+++ b/Python/pathconfig.c
@@ -434,7 +434,12 @@
 {
     PyStatus status;
     PyConfig config;
-    _PyConfig_InitCompatConfig(&config);
+    config.struct_size = sizeof(PyConfig);
+
+    status = _PyConfig_InitCompatConfig(&config);
+    if (_PyStatus_EXCEPTION(status)) {
+        goto done;
+    }
 
     /* Call _PyConfig_InitPathConfig() */
     status = PyConfig_Read(&config);