diff --git a/ironic_python_agent/inspector.py b/ironic_python_agent/inspector.py
index 833592fe3..e95d38211 100644
--- a/ironic_python_agent/inspector.py
+++ b/ironic_python_agent/inspector.py
@@ -133,6 +133,13 @@ def call_inspector(data, failures):
     data = encoder.encode(data)
     verify, cert = utils.get_ssl_client_options(CONF)
 
+    headers = {
+        'Content-Type': 'application/json',
+        'Accept': 'application/json',
+    }
+    if CONF.global_request_id:
+        headers["X-OpenStack-Request-ID"] = CONF.global_request_id
+
     @tenacity.retry(
         retry=tenacity.retry_if_exception_type(
             (requests.exceptions.ConnectionError,
@@ -143,7 +150,7 @@ def call_inspector(data, failures):
         reraise=True)
     def _post_to_inspector():
         inspector_resp = requests.post(
-            CONF.inspection_callback_url, data=data,
+            CONF.inspection_callback_url, data=data, headers=headers,
             verify=verify, cert=cert, timeout=CONF.http_request_timeout)
         if inspector_resp.status_code >= 500:
             raise requests.exceptions.HTTPError(response=inspector_resp)
diff --git a/ironic_python_agent/tests/unit/test_inspector.py b/ironic_python_agent/tests/unit/test_inspector.py
index 4143e938a..be98d432c 100644
--- a/ironic_python_agent/tests/unit/test_inspector.py
+++ b/ironic_python_agent/tests/unit/test_inspector.py
@@ -161,10 +161,12 @@ class TestCallInspector(base.IronicAgentTest):
 
         res = inspector.call_inspector(data, failures)
 
-        mock_post.assert_called_once_with('url',
-                                          cert=None, verify=True,
-                                          data='{"data": 42, "error": null}',
-                                          timeout=30)
+        mock_post.assert_called_once_with(
+            'url', data='{"data": 42, "error": null}',
+            cert=None, verify=True,
+            headers={'Content-Type': 'application/json',
+                     'Accept': 'application/json'},
+            timeout=30)
         self.assertEqual(mock_post.return_value.json.return_value, res)
 
     def test_send_failure(self, mock_post):
@@ -178,6 +180,7 @@ class TestCallInspector(base.IronicAgentTest):
         mock_post.assert_called_once_with('url',
                                           cert=None, verify=True,
                                           data='{"data": 42, "error": "boom"}',
+                                          headers=mock.ANY,
                                           timeout=30)
         self.assertEqual(mock_post.return_value.json.return_value, res)
 
@@ -191,6 +194,7 @@ class TestCallInspector(base.IronicAgentTest):
         mock_post.assert_called_once_with('url',
                                           cert=None, verify=True,
                                           data='{"data": 42, "error": null}',
+                                          headers=mock.ANY,
                                           timeout=30)
         self.assertIsNone(res)
 
@@ -233,6 +237,7 @@ class TestCallInspector(base.IronicAgentTest):
         mock_post.assert_called_with('url',
                                      cert=None, verify=True,
                                      data='{"data": 42, "error": null}',
+                                     headers=mock.ANY,
                                      timeout=30)
 
 
diff --git a/releasenotes/notes/content-type-f4d5ab15adf37252.yaml b/releasenotes/notes/content-type-f4d5ab15adf37252.yaml
new file mode 100644
index 000000000..fb6fbcc38
--- /dev/null
+++ b/releasenotes/notes/content-type-f4d5ab15adf37252.yaml
@@ -0,0 +1,6 @@
+---
+fixes:
+  - |
+    Fixes missing ``Content-Type`` header when sending inspection data back
+    to ironic-inspector or ironic. While ironic-inspector tolerates the
+    missing header, it may cause issues with the new inspection implementation.