diff --git a/testsuite/gtk/builder.c b/testsuite/gtk/builder.c
index 78ff3c9b3a..d57b676d56 100644
--- a/testsuite/gtk/builder.c
+++ b/testsuite/gtk/builder.c
@@ -2448,13 +2448,13 @@ test_transforms (void)
   g_object_unref (builder);
 }
 
-char *
+G_MODULE_EXPORT char *
 builder_get_search (gpointer item)
 {
   return g_strdup (gtk_string_filter_get_search (item));
 }
 
-char *
+G_MODULE_EXPORT char *
 builder_copy_arg (gpointer item, const char *arg)
 {
   return g_strdup (arg);