diff --git a/changelogs/fragments/51600-provider_segmentation_id-is-int.yaml b/changelogs/fragments/51600-provider_segmentation_id-is-int.yaml
new file mode 100644
index 0000000000..f8a1e4c07f
--- /dev/null
+++ b/changelogs/fragments/51600-provider_segmentation_id-is-int.yaml
@@ -0,0 +1,5 @@
+---
+bugfixes:
+  - os_network - According to the OpenStack Networking API the attribute
+    provider:segmentation_id of a network has to be an integer.
+    (https://github.com/ansible/ansible/issues/51655)
diff --git a/lib/ansible/modules/cloud/openstack/os_network.py b/lib/ansible/modules/cloud/openstack/os_network.py
index f699b4ac2f..f717707288 100644
--- a/lib/ansible/modules/cloud/openstack/os_network.py
+++ b/lib/ansible/modules/cloud/openstack/os_network.py
@@ -161,7 +161,7 @@ def main():
         external=dict(default=False, type='bool'),
         provider_physical_network=dict(required=False),
         provider_network_type=dict(required=False),
-        provider_segmentation_id=dict(required=False),
+        provider_segmentation_id=dict(required=False, type='int'),
         state=dict(default='present', choices=['absent', 'present']),
         project=dict(default=None),
         port_security_enabled=dict(default=False, type='bool')