diff --git a/src/lib/sw_engine/tvgSwRasterTexmapInternal.h b/src/lib/sw_engine/tvgSwRasterTexmapInternal.h
index 0c6bf13d..4e8d3421 100644
--- a/src/lib/sw_engine/tvgSwRasterTexmapInternal.h
+++ b/src/lib/sw_engine/tvgSwRasterTexmapInternal.h
@@ -142,6 +142,8 @@
             //Step UV horizontally
             u += _dudx;
             v += _dvdx;
+            //range over?
+            if ((uint32_t)v >= image->h) break;
         }
 next:
         //Step along both edges