@@ -39,7 +39,7 @@ func (cli *Client) ServiceCreate(ctx context.Context, service swarm.ServiceSpec,

 				service.TaskTemplate.ContainerSpec.Image = img

 			}

 			// add platforms that are compatible with the service

-			service.TaskTemplate.Placement = updateServicePlatforms(service.TaskTemplate.Placement, distributionInspect)

+			service.TaskTemplate.Placement = setServicePlatforms(service.TaskTemplate.Placement, distributionInspect)

 		}

 	}

 	var response types.ServiceCreateResponse

@@ -86,13 +86,15 @@ func imageWithTagString(image string) string {

 	return ""

 }

-// updateServicePlatforms updates the Platforms in swarm.Placement to list

-// all compatible platforms for the service, as found in distributionInspect

-// and returns a pointer to the new or updated swarm.Placement struct

-func updateServicePlatforms(placement *swarm.Placement, distributionInspect registrytypes.DistributionInspect) *swarm.Placement {

+// setServicePlatforms sets Platforms in swarm.Placement to list all

+// compatible platforms for the service, as found in distributionInspect

+// and returns a pointer to the new or updated swarm.Placement struct.

+func setServicePlatforms(placement *swarm.Placement, distributionInspect registrytypes.DistributionInspect) *swarm.Placement {

 	if placement == nil {

 		placement = &swarm.Placement{}

 	}

+	// reset any existing listed platforms

+	placement.Platforms = []swarm.Platform{}

 	for _, p := range distributionInspect.Platforms {

 		placement.Platforms = append(placement.Platforms, swarm.Platform{

 			Architecture: p.Architecture,

@@ -51,7 +51,7 @@ func (cli *Client) ServiceUpdate(ctx context.Context, serviceID string, version

 				service.TaskTemplate.ContainerSpec.Image = img

 			}

 			// add platforms that are compatible with the service

-			service.TaskTemplate.Placement = updateServicePlatforms(service.TaskTemplate.Placement, distributionInspect)

+			service.TaskTemplate.Placement = setServicePlatforms(service.TaskTemplate.Placement, distributionInspect)

 		}

 	}