diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..7d9f423
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1 @@
+tests.txt.js
\ No newline at end of file
diff --git a/eval.js b/eval.js
index 428d8fc..5a75bb7 100644
--- a/eval.js
+++ b/eval.js
@@ -149,7 +149,7 @@ const doStep = (ins, stack) => {
     if (instruction.type === "push") {
         pushS(makeObj(instruction.elem), stack);
     } else if (instruction.type === "defn") {
-        defn(ins.defn, ins.ident, stack);
+        defn(instruction.defn, instruction.ident, stack);
     } else {
         apply(makeObj(instruction), stack);
     }