diff --git a/stablecoin/src/open_position.rs b/stablecoin/src/open_position.rs
index d3fb71f..8c33ae8 100644
--- a/stablecoin/src/open_position.rs
+++ b/stablecoin/src/open_position.rs
@@ -71,7 +71,6 @@ pub fn open_position(
         verify_position_vault_and_get_seed(&vault, position.account_id, stablecoin_program_id);
 
     let mut position_post = position.account;
-    position_post.program_owner = stablecoin_program_id;
     position_post.data = Data::from(&Position {
         collateral_vault_id: vault.account_id,
         collateral_definition_id: token_definition.account_id,
diff --git a/stablecoin/src/tests.rs b/stablecoin/src/tests.rs
index 42ad660..9b4e0ee 100644
--- a/stablecoin/src/tests.rs
+++ b/stablecoin/src/tests.rs
@@ -173,7 +173,8 @@ fn open_position_claims_pda_and_emits_chained_calls() {
             debt_amount: 0,
         }
     );
-    assert_eq!(position_post.account().program_owner, STABLECOIN_PROGRAM_ID);
+    // The runtime sets the program_owner on the claimed account after validating Claim::Pda.
+    assert_eq!(position_post.account().program_owner, ProgramId::default());
 
     assert_eq!(chained_calls.len(), 2);