diff --git a/src/boot/sysobj.reb b/src/boot/sysobj.reb
index 6cc03b0510..f851e0033a 100644
--- a/src/boot/sysobj.reb
+++ b/src/boot/sysobj.reb
@@ -149,6 +149,7 @@ modules: object [
 	;; external native extensions
 	blend2d:       https://github.com/Siskin-framework/Rebol-Blend2D/releases/download/0.0.18.1/
 	easing:        https://github.com/Siskin-framework/Rebol-Easing/releases/download/1.0.0/
+	mathpresso:    https://github.com/Siskin-framework/Rebol-MathPresso/releases/download/0.1.0/
 	sqlite:        https://github.com/Siskin-framework/Rebol-SQLite/releases/download/3.40.1.0/
 	triangulate:   https://github.com/Siskin-framework/Rebol-Triangulate/releases/download/1.6.0.0/
 	;; optional modules, protocol and codecs