diff --git a/build/docs.sh b/build/docs.sh
index 93f690e3..4c0c7f21 100755
--- a/build/docs.sh
+++ b/build/docs.sh
@@ -26,4 +26,5 @@ cd jsdoc-toolkit
 java -jar jsrun.jar app/run.js -c=conf/$MODE.conf -D="renderMode:$MODE"
 cd ..
 
+#build paper.js library for documentation
 ./preprocess.sh ../src/paper.js ../dist/docs/resources/js/paper.js "-DBROWSER" stripped
\ No newline at end of file