diff --git a/crates/starknet-os/src/hints/output.rs b/crates/starknet-os/src/hints/output.rs
index 10e0d0b4..aef127f5 100644
--- a/crates/starknet-os/src/hints/output.rs
+++ b/crates/starknet-os/src/hints/output.rs
@@ -209,7 +209,7 @@ pub fn set_n_updates_small(
     let n_updates_small_packing_bound = get_constant(vars::ids::N_UPDATES_SMALL_PACKING_BOUND, constants)?;
 
     let is_n_updates_small =
-        if n_actual_updates < *n_updates_small_packing_bound { Felt252::ZERO } else { Felt252::ONE };
+        if n_actual_updates < *n_updates_small_packing_bound { Felt252::ONE } else { Felt252::ZERO };
 
     insert_value_from_var_name(vars::ids::IS_N_UPDATES_SMALL, is_n_updates_small, vm, ids_data, ap_tracking)
 }
@@ -290,11 +290,11 @@ mod tests {
 
     #[rstest]
     // small updates
-    #[case(10, 0)]
-    #[case(255, 0)]
+    #[case(10, 1)]
+    #[case(255, 1)]
     // big updates
-    #[case(256, 1)]
-    #[case(1024, 1)]
+    #[case(256, 0)]
+    #[case(1024, 0)]
 
     fn test_set_n_updates_small_parameterized(#[case] actual_updates: u64, #[case] expected_is_n_updates_small: u64) {
         let mut vm = VirtualMachine::new(false);
diff --git a/crates/starknet-os/src/io/output.rs b/crates/starknet-os/src/io/output.rs
index 6a424fa2..a68e7f66 100644
--- a/crates/starknet-os/src/io/output.rs
+++ b/crates/starknet-os/src/io/output.rs
@@ -160,7 +160,7 @@ fn deserialize_contract_state_inner<I: Iterator<Item = Felt252>>(
     let (nonce_n_changes, is_n_updates_small) = nonce_n_changes_one_flag.div_rem(&flag_bound);
 
     // Parse n_changes
-    let n_updates_bound = if is_n_updates_small == Felt252::ZERO { n_updates_small_packing_bound } else { bound };
+    let n_updates_bound = if is_n_updates_small == Felt252::ONE { n_updates_small_packing_bound } else { bound };
     let (nonce, n_changes) = nonce_n_changes.div_rem(&n_updates_bound);
 
     // Parse nonces