diff --git a/changelogs/fragments/27-add-hashi_vault-header_value-param.yml b/changelogs/fragments/27-add-hashi_vault-header_value-param.yml
new file mode 100644
index 000000000..7f783ee26
--- /dev/null
+++ b/changelogs/fragments/27-add-hashi_vault-header_value-param.yml
@@ -0,0 +1,2 @@
+minor_changes:
+  - Add optional ``aws_iam_server_id`` parameter as the value for ``X-Vault-AWS-IAM-Server-ID`` header (https://github.com/ansible-collections/community.hashi_vault/pull/27).
diff --git a/plugins/lookup/hashi_vault.py b/plugins/lookup/hashi_vault.py
index f7d924945..df8dfc5ff 100644
--- a/plugins/lookup/hashi_vault.py
+++ b/plugins/lookup/hashi_vault.py
@@ -163,6 +163,14 @@
       env:
         - name: EC2_REGION
         - name: AWS_REGION
+    aws_iam_server_id:
+      description: If specified, sets the value to use for the C(X-Vault-AWS-IAM-Server-ID) header as part of C(GetCallerIdentity) request.
+      env:
+        - name: ANSIBLE_HASHI_VAULT_AWS_IAM_SERVER_ID
+      ini:
+        - section: lookup_hashi_vault
+          key: aws_iam_server_id
+      required: False
 """
 
 EXAMPLES = """
@@ -635,6 +643,9 @@ def validate_auth_aws_iam_login(self, auth_method):
         if self.get_option('region'):
             params['region'] = self.get_option('region')
 
+        if self.get_option('aws_iam_server_id'):
+            params['header_value'] = self.get_option('aws_iam_server_id')
+
         if not (params['access_key'] and params['secret_key']):
             profile = self.get_option('aws_profile')
             if profile: