diff --git a/google-beta/resource_compute_firewall.go b/google-beta/resource_compute_firewall.go
index e92ceafa77..d58e47ce52 100644
--- a/google-beta/resource_compute_firewall.go
+++ b/google-beta/resource_compute_firewall.go
@@ -21,6 +21,7 @@ import (
 	"reflect"
 	"sort"
 	"strconv"
+	"strings"
 	"time"
 
 	"github.com/hashicorp/terraform/helper/hashcode"
@@ -32,7 +33,7 @@ import (
 func resourceComputeFirewallRuleHash(v interface{}) int {
 	var buf bytes.Buffer
 	m := v.(map[string]interface{})
-	buf.WriteString(fmt.Sprintf("%s-", m["protocol"].(string)))
+	buf.WriteString(fmt.Sprintf("%s-", strings.ToLower(m["protocol"].(string))))
 
 	// We need to make sure to sort the strings below so that we always
 	// generate the same hash code no matter what is in the set.
@@ -48,6 +49,13 @@ func resourceComputeFirewallRuleHash(v interface{}) int {
 	return hashcode.String(buf.String())
 }
 
+func compareCaseInsensitive(k, old, new string, d *schema.ResourceData) bool {
+	if strings.ToLower(old) == strings.ToLower(new) {
+		return true
+	}
+	return false
+}
+
 func resourceComputeFirewall() *schema.Resource {
 	return &schema.Resource{
 		Create: resourceComputeFirewallCreate,
@@ -199,8 +207,9 @@ func computeFirewallAllowSchema() *schema.Resource {
 	return &schema.Resource{
 		Schema: map[string]*schema.Schema{
 			"protocol": {
-				Type:     schema.TypeString,
-				Required: true,
+				Type:             schema.TypeString,
+				Required:         true,
+				DiffSuppressFunc: compareCaseInsensitive,
 			},
 			"ports": {
 				Type:     schema.TypeList,
@@ -217,8 +226,9 @@ func computeFirewallDenySchema() *schema.Resource {
 	return &schema.Resource{
 		Schema: map[string]*schema.Schema{
 			"protocol": {
-				Type:     schema.TypeString,
-				Required: true,
+				Type:             schema.TypeString,
+				Required:         true,
+				DiffSuppressFunc: compareCaseInsensitive,
 			},
 			"ports": {
 				Type:     schema.TypeList,