diff --git a/aws/resource_aws_mwaa_environment.go b/aws/resource_aws_mwaa_environment.go
index 80d5ae20e4c..35476830fcb 100644
--- a/aws/resource_aws_mwaa_environment.go
+++ b/aws/resource_aws_mwaa_environment.go
@@ -55,6 +55,7 @@ func resourceAwsMwaaEnvironment() *schema.Resource {
 			"execution_role_arn": {
 				Type:     schema.TypeString,
 				Required: true,
+				ValidateFunc: validateArn,
 			},
 			"kms_key": {
 				Type:         schema.TypeString,