diff --git a/azure/services/networkinterfaces/spec.go b/azure/services/networkinterfaces/spec.go
index 4e73cf6101a..5f287fd6034 100644
--- a/azure/services/networkinterfaces/spec.go
+++ b/azure/services/networkinterfaces/spec.go
@@ -58,9 +58,8 @@ type NICSpec struct {
 
 // IPConfig defines the specification for an IP address configuration.
 type IPConfig struct {
-	PrivateIP       string
-	PublicIP        bool
-	PublicIPAddress string
+	PrivateIP       *string
+	PublicIPAddress *string
 }
 
 // ResourceName returns the name of the network interface.
@@ -164,21 +163,21 @@ func (s *NICSpec) Parameters(ctx context.Context, existing interface{}) (paramet
 			Name:                                     to.StringPtr(s.Name + "-" + strconv.Itoa(i)),
 			InterfaceIPConfigurationPropertiesFormat: newIPConfigPropertiesFormat,
 		}
-		if c.PrivateIP == "" {
-			config.InterfaceIPConfigurationPropertiesFormat.PrivateIPAllocationMethod = network.IPAllocationMethodDynamic
-		} else {
+		if c.PrivateIP != nil && *c.PrivateIP != "" {
 			config.InterfaceIPConfigurationPropertiesFormat.PrivateIPAllocationMethod = network.IPAllocationMethodStatic
-			config.InterfaceIPConfigurationPropertiesFormat.PrivateIPAddress = &c.PrivateIP
+			config.InterfaceIPConfigurationPropertiesFormat.PrivateIPAddress = c.PrivateIP
+		} else {
+			config.InterfaceIPConfigurationPropertiesFormat.PrivateIPAllocationMethod = network.IPAllocationMethodDynamic
 		}
 
-		if c.PublicIP && c.PublicIPAddress != "" {
+		if c.PublicIPAddress != nil && *c.PublicIPAddress != "" {
 			config.InterfaceIPConfigurationPropertiesFormat.PublicIPAddress = &network.PublicIPAddress{
 				PublicIPAddressPropertiesFormat: &network.PublicIPAddressPropertiesFormat{
 					PublicIPAllocationMethod: network.IPAllocationMethodStatic,
-					IPAddress:                &c.PublicIPAddress,
+					IPAddress:                c.PublicIPAddress,
 				},
 			}
-		} else if c.PublicIP {
+		} else if c.PublicIPAddress != nil {
 			config.InterfaceIPConfigurationPropertiesFormat.PublicIPAddress = &network.PublicIPAddress{
 				PublicIPAddressPropertiesFormat: &network.PublicIPAddressPropertiesFormat{
 					PublicIPAllocationMethod: network.IPAllocationMethodDynamic,