diff --git a/builtin/providers/google/resource_compute_forwarding_rule.go b/builtin/providers/google/resource_compute_forwarding_rule.go
index b4bd4a7792..99684560dd 100644
--- a/builtin/providers/google/resource_compute_forwarding_rule.go
+++ b/builtin/providers/google/resource_compute_forwarding_rule.go
@@ -88,6 +88,7 @@ func resourceComputeForwardingRule() *schema.Resource {
 				Type:     schema.TypeSet,
 				Elem:     &schema.Schema{Type: schema.TypeString},
 				Optional: true,
+				ForceNew: true,
 				Set:      schema.HashString,
 			},