diff --git a/games-engines/dragengine/dragengine-1.18.recipe b/games-engines/dragengine/dragengine-1.18.recipe
index 53af5ffd6..a4abff44b 100644
--- a/games-engines/dragengine/dragengine-1.18.recipe
+++ b/games-engines/dragengine/dragengine-1.18.recipe
@@ -80,6 +80,7 @@ BUILD_PREREQUIRES="
 	cmd:make
 	cmd:nasm
 	cmd:cmake
+	cmd:diff
 	"
 
 BUILD()