diff --git a/plugins/modules/ecs_taskdefinition.py b/plugins/modules/ecs_taskdefinition.py
index 4c4aefc2032..36e07112c9e 100644
--- a/plugins/modules/ecs_taskdefinition.py
+++ b/plugins/modules/ecs_taskdefinition.py
@@ -897,6 +897,8 @@ def register_task(
             params["placementConstraints"] = placement_constraints
         if runtime_platform:
             params["runtimePlatform"] = runtime_platform
+        if launch_type != "FARGATE":
+            params["runtimePlatform"] = {}
 
         try:
             response = self.ecs.register_task_definition(aws_retry=True, **params)