diff --git a/lttb-manual.md b/lttb-manual.md
index 1e16896..529a0bc 100644
--- a/lttb-manual.md
+++ b/lttb-manual.md
@@ -154,7 +154,6 @@ Exit the interpreter, or restart it if exiting is not supported.
 
 The interpreter should emit runtime errors in these cases:
 
-* unknown commands in statements;
 * unmatched parentheses in expressions;
 * call stack underflow (e.g. `RETURN` with no prior `GOSUB`);
 * division by zero (optional).