diff --git a/src/lib/tvgPaint.cpp b/src/lib/tvgPaint.cpp
index aca756fd..9b0aba77 100644
--- a/src/lib/tvgPaint.cpp
+++ b/src/lib/tvgPaint.cpp
@@ -206,7 +206,7 @@ void* Paint::Impl::update(RenderMethod& renderer, const RenderTransform* pTransf
             RenderRegion viewport2;
             if ((cmpFastTrack = _clipPathFastTrack(cmpTarget, pTransform, cmpTarget->pImpl->rTransform, viewport2))) {
                 viewport = renderer.viewport();
-                viewport2.merge(viewport);
+                viewport2.intersect(viewport);
                 renderer.viewport(viewport2);
             }
         }
diff --git a/src/lib/tvgRender.h b/src/lib/tvgRender.h
index 16da972d..b45405ad 100644
--- a/src/lib/tvgRender.h
+++ b/src/lib/tvgRender.h
@@ -49,7 +49,7 @@ struct Compositor {
 struct RenderRegion {
     uint32_t x, y, w, h;
 
-    void merge(const RenderRegion& rhs)
+    void intersect(const RenderRegion& rhs)
     {
         auto x1 = x + w;
         auto y1 = y + h;