diff --git a/providers/provider.go b/providers/provider.go
index c4044b4be..7deb608a2 100644
--- a/providers/provider.go
+++ b/providers/provider.go
@@ -62,6 +62,9 @@ type Interface interface {
 
 	// ReadDataSource returns the data source's current state.
 	ReadDataSource(ReadDataSourceRequest) ReadDataSourceResponse
+
+	// Close shuts down the plugin process if applicable.
+	Close() error
 }
 
 type GetSchemaResponse struct {
diff --git a/provisioners/provisioner.go b/provisioners/provisioner.go
index 93eda89df..e53c88488 100644
--- a/provisioners/provisioner.go
+++ b/provisioners/provisioner.go
@@ -32,6 +32,9 @@ type Interface interface {
 	// stop somehow failed and that the user should expect potentially waiting
 	// a longer period of time.
 	Stop() error
+
+	// Close shuts down the plugin process if applicable.
+	Close() error
 }
 
 type GetSchemaResponse struct {