diff --git a/src/backend/utils/misc/guc.c b/src/backend/utils/misc/guc.c
index 547cecde240..a043d529efa 100644
--- a/src/backend/utils/misc/guc.c
+++ b/src/backend/utils/misc/guc.c
@@ -1289,10 +1289,10 @@ find_option(const char *name, bool create_placeholders, bool skip_errors,
 static int
 guc_var_compare(const void *a, const void *b)
 {
-	const struct config_generic *confa = *(struct config_generic *const *) a;
-	const struct config_generic *confb = *(struct config_generic *const *) b;
+	const char *namea = **(const char ** const *) a;
+	const char *nameb = **(const char ** const *) b;
 
-	return guc_name_compare(confa->name, confb->name);
+	return guc_name_compare(namea, nameb);
 }
 
 /*