diff --git a/aws/resource_aws_codebuild_project.go b/aws/resource_aws_codebuild_project.go
index 4a378ecf0481..5da30952eadd 100644
--- a/aws/resource_aws_codebuild_project.go
+++ b/aws/resource_aws_codebuild_project.go
@@ -176,8 +176,7 @@ func resourceAwsCodeBuildProject() *schema.Resource {
 			},
 			"service_role": {
 				Type:     schema.TypeString,
-				Optional: true,
-				Computed: true,
+				Required: true,
 			},
 			"source": {
 				Type: schema.TypeSet,
diff --git a/website/docs/r/codebuild_project.html.markdown b/website/docs/r/codebuild_project.html.markdown
index 5afd8bd94d3c..c0ba2f9f7bbd 100644
--- a/website/docs/r/codebuild_project.html.markdown
+++ b/website/docs/r/codebuild_project.html.markdown
@@ -154,7 +154,7 @@ The following arguments are supported:
 * `cache` - (Optional) Information about the cache storage for the project. Cache blocks are documented below.
 * `description` - (Optional) A short description of the project.
 * `encryption_key` - (Optional) The AWS Key Management Service (AWS KMS) customer master key (CMK) to be used for encrypting the build project's build output artifacts.
-* `service_role` - (Optional) The Amazon Resource Name (ARN) of the AWS Identity and Access Management (IAM) role that enables AWS CodeBuild to interact with dependent AWS services on behalf of the AWS account.
+* `service_role` - (Required) The Amazon Resource Name (ARN) of the AWS Identity and Access Management (IAM) role that enables AWS CodeBuild to interact with dependent AWS services on behalf of the AWS account.
 * `tags` - (Optional) A mapping of tags to assign to the resource.
 * `vpc_config` - (Optional) Configuration for the builds to run inside a VPC. VPC config blocks are documented below.