diff --git a/mws/resource_workspace.go b/mws/resource_workspace.go
index b4acddb025..baacaee879 100644
--- a/mws/resource_workspace.go
+++ b/mws/resource_workspace.go
@@ -67,7 +67,7 @@ type GCPCommonNetworkConfig struct {
 
 type GCPNetwork struct {
 	NetworkID               string                   `json:"network_id,omitempty"`
-	GCPManagedNetworkConfig *GCPManagedNetworkConfig `json:"gcp_managed_network_config"`
+	GCPManagedNetworkConfig *GCPManagedNetworkConfig `json:"gcp_managed_network_config,omitempty"`
 	GCPCommonNetworkConfig  *GCPCommonNetworkConfig  `json:"gcp_common_network_config"`
 }