diff --git a/desktop/sources/scripts/lisp.js b/desktop/sources/scripts/lisp.js
index 56eec45..4132d41 100644
--- a/desktop/sources/scripts/lisp.js
+++ b/desktop/sources/scripts/lisp.js
@@ -35,7 +35,7 @@ function Lisp (input, lib) {
       return interpret(input[2], letContext)
     },
     def: function (input, context) {
-      context.scope[input[1].value] = input[2].value
+      context.scope[input[1].value] = interpret(input[2], context)
       return input[2]
     },
     lambda: function (input, context) {
diff --git a/examples/benchmark.lisp b/examples/benchmark.lisp
index 5b6abcc..75f3d77 100644
--- a/examples/benchmark.lisp
+++ b/examples/benchmark.lisp
@@ -41,5 +41,7 @@
 ; Scope
 
   (def aaa 123)
-  (test "def" aaa 123)
+  (def addOne (lambda (a) (add a 1)))
+  (test "def - value" aaa 123)
+  (test "def - func" (addOne 4) 5)
 )
\ No newline at end of file
diff --git a/examples/include.lisp b/examples/include.lisp
index ae2231f..f063b40 100644
--- a/examples/include.lisp
+++ b/examples/include.lisp
@@ -1,3 +1,4 @@
 (
   (def value 12)
+  (def addOne (lambda (a) (add a 1)))
 )
\ No newline at end of file
diff --git a/examples/run.lisp b/examples/run.lisp
index 84dc6ee..1d01a28 100644
--- a/examples/run.lisp
+++ b/examples/run.lisp
@@ -1 +1,7 @@
-(run "./include.lisp")
\ No newline at end of file
+(
+    (run "./include.lisp")
+
+    (echo value)
+
+    (echo (addOne value))
+)
\ No newline at end of file