diff --git a/src/backend/utils/misc/guc.c b/src/backend/utils/misc/guc.c
index 09fe7684a40..958c3df6e47 100644
--- a/src/backend/utils/misc/guc.c
+++ b/src/backend/utils/misc/guc.c
@@ -5809,10 +5809,10 @@ 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 *confa_name = **(char **const *) a;
+	const char *confb_name = **(char **const *) b;
 
-	return guc_name_compare(confa->name, confb->name);
+	return guc_name_compare(confa_name, confb_name);
 }
 
 /*