diff --git a/aws/resource_aws_globalaccelerator_endpoint_group.go b/aws/resource_aws_globalaccelerator_endpoint_group.go
index 5aa50b2af01b..d93ccbe01b2a 100644
--- a/aws/resource_aws_globalaccelerator_endpoint_group.go
+++ b/aws/resource_aws_globalaccelerator_endpoint_group.go
@@ -128,8 +128,8 @@ func resourceAwsGlobalAcceleratorEndpointGroupCreate(d *schema.ResourceData, met
 		opts.ThresholdCount = aws.Int64(int64(v.(int)))
 	}
 
-	if v, ok := d.GetOk("traffic_dial_percentage"); ok {
-		opts.TrafficDialPercentage = aws.Float64(v.(float64))
+	if v, ok := d.Get("traffic_dial_percentage").(float64); ok {
+		opts.TrafficDialPercentage = aws.Float64(v)
 	}
 
 	if v, ok := d.GetOk("endpoint_configuration"); ok {
@@ -279,8 +279,8 @@ func resourceAwsGlobalAcceleratorEndpointGroupUpdate(d *schema.ResourceData, met
 		opts.ThresholdCount = aws.Int64(int64(v.(int)))
 	}
 
-	if v, ok := d.GetOk("traffic_dial_percentage"); ok {
-		opts.TrafficDialPercentage = aws.Float64(v.(float64))
+	if v, ok := d.Get("traffic_dial_percentage").(float64); ok {
+		opts.TrafficDialPercentage = aws.Float64(v)
 	}
 
 	if v, ok := d.GetOk("endpoint_configuration"); ok {