diff --git a/builtin/providers/aws/resource_aws_autoscaling_policy.go b/builtin/providers/aws/resource_aws_autoscaling_policy.go
index 63ca8341c..3c91bd32b 100644
--- a/builtin/providers/aws/resource_aws_autoscaling_policy.go
+++ b/builtin/providers/aws/resource_aws_autoscaling_policy.go
@@ -220,7 +220,7 @@ func getAwsAutoscalingPutScalingPolicyInput(d *schema.ResourceData) (autoscaling
 
 	//if policy_type=="SimpleScaling" then scaling_adjustment is required and 0 is allowed
 	if v, ok := d.GetOk("scaling_adjustment"); ok || *params.PolicyType == "SimpleScaling" {
-		params.EstimatedInstanceWarmup = aws.Int64(int64(v.(int)))
+		params.ScalingAdjustment = aws.Int64(int64(v.(int)))
 	}
 
 	if v, ok := d.GetOk("step_adjustment"); ok {