diff --git a/changelogs/fragments/powershell-7.3-fix.yml b/changelogs/fragments/powershell-7.3-fix.yml
new file mode 100644
index 00000000000..1a9b8d31ac1
--- /dev/null
+++ b/changelogs/fragments/powershell-7.3-fix.yml
@@ -0,0 +1,2 @@
+bugfixes:
+  - Ansible.Basic.cs - Ignore compiler warning (reported as an error) when running under PowerShell 7.3.x.
diff --git a/lib/ansible/module_utils/csharp/Ansible.Basic.cs b/lib/ansible/module_utils/csharp/Ansible.Basic.cs
index 2db9728ddc5..c68281ef1bd 100644
--- a/lib/ansible/module_utils/csharp/Ansible.Basic.cs
+++ b/lib/ansible/module_utils/csharp/Ansible.Basic.cs
@@ -16,6 +16,10 @@ using Newtonsoft.Json;
 using System.Web.Script.Serialization;
 #endif
 
+// Newtonsoft.Json may reference a different System.Runtime version (6.x) than loaded by PowerShell 7.3 (7.x).
+// Ignore CS1701 so the code can be compiled when warnings are reported as errors.
+//NoWarn -Name CS1701 -CLR Core
+
 // System.Diagnostics.EventLog.dll reference different versioned dlls that are
 // loaded in PSCore, ignore CS1702 so the code will ignore this warning
 //NoWarn -Name CS1702 -CLR Core