diff --git a/flap/questions/retrolixToX86_64/06.retrolix b/flap/questions/retrolixToX86_64/06.retrolix
index e69de29..71a1611 100644
--- a/flap/questions/retrolixToX86_64/06.retrolix
+++ b/flap/questions/retrolixToX86_64/06.retrolix
@@ -0,0 +1,25 @@
+def fact ()
+  %rax <- copy 1;
+
+  condition:
+  jumpif lte %rdi, 1 -> fin, boucle;
+
+  boucle:
+  %rax <- mul %rax, %rdi;
+  %rdi <- sub %rdi, 1;
+  jump condition;
+
+  fin:
+  ret;
+end
+
+globals (x)
+  x <- copy 5;
+
+  %rdi <- copy x;
+  fact();
+  x <- copy %rax;
+
+  %rdi <- copy x;
+  observe_int();
+end