diff --git a/changelogs/fragments/3940_fix_contenttype_scaleway_user_data.yml b/changelogs/fragments/3940_fix_contenttype_scaleway_user_data.yml
new file mode 100644
index 0000000000..97d97b67c1
--- /dev/null
+++ b/changelogs/fragments/3940_fix_contenttype_scaleway_user_data.yml
@@ -0,0 +1,2 @@
+bugfixes:
+  - scaleway_user_data - fix double-quote added where no double-quote is needed to user data in scaleway's server (``Content-type`` -> ``Content-Type``) (https://github.com/ansible-collections/community.general/pull/3940).
diff --git a/plugins/modules/cloud/scaleway/scaleway_user_data.py b/plugins/modules/cloud/scaleway/scaleway_user_data.py
index 2a468a1734..2848ec2c4a 100644
--- a/plugins/modules/cloud/scaleway/scaleway_user_data.py
+++ b/plugins/modules/cloud/scaleway/scaleway_user_data.py
@@ -75,7 +75,7 @@ def patch_user_data(compute_api, server_id, key, value):
     compute_api.module.debug("Starting patching user_data attributes")
 
     path = "servers/%s/user_data/%s" % (server_id, key)
-    response = compute_api.patch(path=path, data=value, headers={"Content-type": "text/plain"})
+    response = compute_api.patch(path=path, data=value, headers={"Content-Type": "text/plain"})
     if not response.ok:
         msg = 'Error during user_data patching: %s %s' % (response.status_code, response.body)
         compute_api.module.fail_json(msg=msg)