diff --git a/src/parsing/irot.js b/src/parsing/irot.js
new file mode 100644
index 00000000..27613b1f
--- /dev/null
+++ b/src/parsing/irot.js
@@ -0,0 +1,4 @@
+BoxParser.createBoxCtor("irot", function(stream) {
+	this.angle = stream.readUint8() & 0x3;
+});
+