diff --git a/slides/cours_11.md b/slides/cours_11.md
index 73689f4f965377fcaab202ef70c14203100ef8e7..7dece9bc7743c43c7a3c8acf0d8d55d22b0b4514 100644
--- a/slides/cours_11.md
+++ b/slides/cours_11.md
@@ -221,7 +221,7 @@ int stack_pop(stack *s, int *val) {
     element *tmp = *s;
     *s = (*s)->next;
     free(tmp);
-    return val;
+    return *val;
 }
 ```