diff --git a/contents/monte_carlo_integration/code/asm-x64/monte_carlo.s b/contents/monte_carlo_integration/code/asm-x64/monte_carlo.s
index 61355cc95..4fb6d93aa 100644
--- a/contents/monte_carlo_integration/code/asm-x64/monte_carlo.s
+++ b/contents/monte_carlo_integration/code/asm-x64/monte_carlo.s
@@ -84,5 +84,6 @@ main:
   call   printf
   add    rsp, 16
   pop    rbp
+  xor    rax, rax                   # Set exit code to 0
   ret
 
diff --git a/contents/verlet_integration/code/asm-x64/verlet.s b/contents/verlet_integration/code/asm-x64/verlet.s
index d9617fe33..0e0d031b3 100644
--- a/contents/verlet_integration/code/asm-x64/verlet.s
+++ b/contents/verlet_integration/code/asm-x64/verlet.s
@@ -124,5 +124,6 @@ main:
   mov    rax, 1
   call   printf
   pop    rbp
+  xor    rax, rax                      # Set exit code to 0
   ret