diff --git a/azurerm/resource_arm_public_ip.go b/azurerm/resource_arm_public_ip.go
index 888398c833c1d..b52bc30688d18 100644
--- a/azurerm/resource_arm_public_ip.go
+++ b/azurerm/resource_arm_public_ip.go
@@ -49,7 +49,10 @@ func resourceArmPublicIp() *schema.Resource {
 			"public_ip_address_allocation": {
 				Type:             schema.TypeString,
 				Required:         true,
-				ValidateFunc:     validation.StringInSlice([]string{"static", "dynamic"}, true),
+				ValidateFunc:     validation.StringInSlice([]string{
+					string(network.Static),
+					string(network.Dynamic),
+				}, true),
 				DiffSuppressFunc: ignoreCaseDiffSuppressFunc,
 				StateFunc:        ignoreCaseStateFunc,
 			},