diff --git a/ir/README.md b/ir/README.md
index 2cca09936..05b5acb65 100644
--- a/ir/README.md
+++ b/ir/README.md
@@ -27,7 +27,7 @@ The only requirement on label string is that they are nonempty and contain no wh
 // apply(function, argument)
 {"0": "a", "f": expression, "a": expression}
 // let(label, value, then)
-{"0": "a", "l": label, "v": expression, "t": expression}
+{"0": "l", "l": label, "v": expression, "t": expression}
 // b already taken when adding binary
 // binary(value)
 {"0": "x", "v": bytes}
@@ -65,4 +65,4 @@ The only requirement on label string is that they are nonempty and contain no wh
 {"0": "b", "l": label}
 // reference(label)
 {"0": "#", "l": label}
-```
\ No newline at end of file
+```