diff --git a/src/geotiffimage.js b/src/geotiffimage.js
index b939f627..233afc3d 100644
--- a/src/geotiffimage.js
+++ b/src/geotiffimage.js
@@ -857,7 +857,7 @@ class GeoTIFFImage {
     if (modelTransformation) {
       return [
         modelTransformation[0],
-        modelTransformation[5],
+        -modelTransformation[5],
         modelTransformation[10],
       ];
     }