diff --git a/gsk/gskrendernodeprivate.h b/gsk/gskrendernodeprivate.h
index 20e6084d0c..08c8c7e516 100644
--- a/gsk/gskrendernodeprivate.h
+++ b/gsk/gskrendernodeprivate.h
@@ -77,6 +77,7 @@ GskRenderNode *gsk_render_node_new (void);
 
 void gsk_render_node_make_immutable (GskRenderNode *node);
 
+_GDK_EXTERN
 void gsk_render_node_get_bounds (GskRenderNode   *node,
                                  graphene_rect_t *frame);
 void gsk_render_node_get_transform (GskRenderNode     *node,