diff --git a/lib/umka b/lib/umka
index fcf7a67..e055fcd 160000
--- a/lib/umka
+++ b/lib/umka
@@ -1 +1 @@
-Subproject commit fcf7a67da4d1d20dcf9dca14979a4c1845f6ac06
+Subproject commit e055fcda66f0fb2abdcc9bb022873b99aceddf17
diff --git a/src/staembed.c b/src/staembed.c
index c8473c8..aac19b4 100644
--- a/src/staembed.c
+++ b/src/staembed.c
@@ -691,7 +691,8 @@ const char *th_em_modulesrc[] = {
 "\t\tth::__error(\"image is invalid\")\n"
 "\t}\n"
 "\n"
-"\tumth_image_crop(i^, r.getPos(), r.getEnd())\n"
+"\tdm := i.getDims()\n"
+"\tumth_image_crop(i^, r.getPos().div(dm), r.getEnd().div(dm))\n"
 "}\n"
 "\n"
 "fn umth_image_crop_quad(img: Image, q: ^th::Quad)\n"
diff --git a/umka/image.um b/umka/image.um
index 1a98d84..b055474 100644
--- a/umka/image.um
+++ b/umka/image.um
@@ -192,7 +192,8 @@ fn (i: ^Image) cropRect*(r: rect::Rect) {
 		th::__error("image is invalid")
 	}
 
-	umth_image_crop(i^, r.getPos(), r.getEnd())
+	dm := i.getDims()
+	umth_image_crop(i^, r.getPos().div(dm), r.getEnd().div(dm))
 }
 
 fn umth_image_crop_quad(img: Image, q: ^th::Quad)