diff --git a/package/explorercanvas/explorercanvas.hash b/package/explorercanvas/explorercanvas.hash
new file mode 100644
index 000000000..ae1bfcdb8
--- /dev/null
+++ b/package/explorercanvas/explorercanvas.hash
@@ -0,0 +1,2 @@
+# From http://code.google.com/p/explorercanvas/downloads/detail?name=excanvas_r3.zip&can=2&q=
+sha1	f1b9f7a44428eb0c7b27fe8ac0242d34ec94a385	excanvas_r3.zip