diff --git a/azurerm/internal/services/apimanagement/resource_arm_api_management_api.go b/azurerm/internal/services/apimanagement/resource_arm_api_management_api.go
index ea79b207f4be..5c74cae2cfa3 100644
--- a/azurerm/internal/services/apimanagement/resource_arm_api_management_api.go
+++ b/azurerm/internal/services/apimanagement/resource_arm_api_management_api.go
@@ -100,6 +100,10 @@ func resourceArmApiManagementApi() *schema.Resource {
 							Type:     schema.TypeString,
 							Required: true,
 							ValidateFunc: validation.StringInSlice([]string{
+								string(apimanagement.Openapi),
+								string(apimanagement.Openapijson),
+								string(apimanagement.OpenapijsonLink),
+								string(apimanagement.OpenapiLink),
 								string(apimanagement.SwaggerJSON),
 								string(apimanagement.SwaggerLinkJSON),
 								string(apimanagement.WadlLinkJSON),
diff --git a/examples/api-management/variables.tf b/examples/api-management/variables.tf
index 13c4b32c803d..0d7983f80e21 100644
--- a/examples/api-management/variables.tf
+++ b/examples/api-management/variables.tf
@@ -7,7 +7,7 @@ variable "location" {
 }
 
 variable "open_api_spec_content_format" {
-    description = "The format of the content from which the API Definition should be imported. Possible values are: swagger-json, swagger-link-json, wadl-link-json, wadl-xml, wsdl and wsdl-link."
+    description = "The format of the content from which the API Definition should be imported. Possible values are: openapi, openapi+json, openapi+json-link, openapi-link, swagger-json, swagger-link-json, wadl-link-json, wadl-xml, wsdl and wsdl-link."
 }
 
 variable "open_api_spec_content_value" {
diff --git a/website/docs/r/api_management_api.html.markdown b/website/docs/r/api_management_api.html.markdown
index f32cb79d799b..75e9b4261804 100644
--- a/website/docs/r/api_management_api.html.markdown
+++ b/website/docs/r/api_management_api.html.markdown
@@ -84,7 +84,7 @@ The following arguments are supported:
 
 A `import` block supports the following:
 
-* `content_format` - (Required) The format of the content from which the API Definition should be imported. Possible values are: `swagger-json`, `swagger-link-json`, `wadl-link-json`, `wadl-xml`, `wsdl` and `wsdl-link`.
+* `content_format` - (Required) The format of the content from which the API Definition should be imported. Possible values are: `openapi`, `openapi+json`, `openapi+json-link`, `openapi-link`, `swagger-json`, `swagger-link-json`, `wadl-link-json`, `wadl-xml`, `wsdl` and `wsdl-link`.
 
 * `content_value` - (Required) The Content from which the API Definition should be imported. When a `content_format` of `*-link-*` is specified this must be a URL, otherwise this must be defined inline.