diff --git a/cloudplatform/connectivity-oauth/src/main/java/com/sap/cloud/sdk/cloudplatform/connectivity/OAuth2Service.java b/cloudplatform/connectivity-oauth/src/main/java/com/sap/cloud/sdk/cloudplatform/connectivity/OAuth2Service.java
index c63d7d241..ea3b29d8a 100644
--- a/cloudplatform/connectivity-oauth/src/main/java/com/sap/cloud/sdk/cloudplatform/connectivity/OAuth2Service.java
+++ b/cloudplatform/connectivity-oauth/src/main/java/com/sap/cloud/sdk/cloudplatform/connectivity/OAuth2Service.java
@@ -230,7 +230,7 @@ private void setAppTidInCaseOfIAS( @Nullable final String tenantId )
             additionalParameters.put("app_tid", tenantId);
             if( onBehalfOf == OnBehalfOf.NAMED_USER_CURRENT_TENANT ) {
                 // workaround until a fix is provided by IAS
-                additionalParameters.put("refresh_token", "0");
+                additionalParameters.put("refresh_expiry", "0");
             }
         }
     }
diff --git a/cloudplatform/connectivity-oauth/src/test/java/com/sap/cloud/sdk/cloudplatform/connectivity/OAuth2ServiceTest.java b/cloudplatform/connectivity-oauth/src/test/java/com/sap/cloud/sdk/cloudplatform/connectivity/OAuth2ServiceTest.java
index b22fc3f94..9ddd50ac0 100644
--- a/cloudplatform/connectivity-oauth/src/test/java/com/sap/cloud/sdk/cloudplatform/connectivity/OAuth2ServiceTest.java
+++ b/cloudplatform/connectivity-oauth/src/test/java/com/sap/cloud/sdk/cloudplatform/connectivity/OAuth2ServiceTest.java
@@ -244,7 +244,7 @@ void testSubdomainTenantStrategy()
                     2,
                     postRequestedFor(urlEqualTo("/oauth/token"))
                         .withRequestBody(containing("app_tid=" + tenant.getTenantId()))
-                        .withRequestBody(containing("refresh_token=0"))
+                        .withRequestBody(containing("refresh_expiry=0"))
                         .withRequestBody(
                             containing("grant_type=urn:ietf:params:oauth:grant-type:jwt-bearer".replace(":", "%3A")))
                         .withRequestBody(containing("assertion=")));
diff --git a/release_notes.md b/release_notes.md
index f865d3f10..700c60d9b 100644
--- a/release_notes.md
+++ b/release_notes.md
@@ -24,4 +24,4 @@
 
 ### 🐛 Fixed Issues
 
-- 
+- Fixed IAS OAuth2 token requests to use correct `refresh_expiry=0` parameter instead of `refresh_token=0` to disable refresh token issuance in certain cases.