diff --git a/agent/api/task_windows.go b/agent/api/task_windows.go
index 97d1c47b6ff..e4cdd3e5191 100644
--- a/agent/api/task_windows.go
+++ b/agent/api/task_windows.go
@@ -17,6 +17,7 @@ package api
 
 import (
 	"path/filepath"
+	"runtime"
 	"strings"
 
 	"github.com/aws/amazon-ecs-agent/agent/config"
@@ -28,6 +29,8 @@ const (
 	memorySwappinessDefault = -1
 )
 
+var cpus = runtime.NumCPU() * 1024
+
 // adjustForPlatform makes Windows-specific changes to the task after unmarshal
 func (task *Task) adjustForPlatform(cfg *config.Config) {
 	task.downcaseAllVolumePaths()
@@ -59,6 +62,7 @@ func getCanonicalPath(path string) string {
 // passed to Docker API.
 func (task *Task) platformHostConfigOverride(hostConfig *docker.HostConfig) error {
 	task.overrideDefaultMemorySwappiness(hostConfig)
+	hostConfig.CPUPercent = hostConfig.CPUShares / int64(cpus)
 	return nil
 }
 
diff --git a/agent/api/task_windows_test.go b/agent/api/task_windows_test.go
index 4d879e540cc..d97d576a386 100644
--- a/agent/api/task_windows_test.go
+++ b/agent/api/task_windows_test.go
@@ -112,10 +112,10 @@ func TestWindowsPlatformHostConfigOverride(t *testing.T) {
 
 	task := &Task{}
 
-	hostConfig := &docker.HostConfig{}
+	hostConfig := &docker.HostConfig{CPUShares: 1024}
 
 	task.platformHostConfigOverride(hostConfig)
-
+	assert.Equal(t, int64(1024)/int64(cpus), hostConfig.CPUPercent)
 	assert.EqualValues(t, expectedMemorySwappinessDefault, hostConfig.MemorySwappiness)
 }