diff --git a/chef/provider.go b/chef/provider.go
index c1b2d8f4..1e4e7927 100644
--- a/chef/provider.go
+++ b/chef/provider.go
@@ -22,6 +22,7 @@ func Provider() terraform.ResourceProvider {
 				Required:    true,
 				DefaultFunc: schema.EnvDefaultFunc("CHEF_SERVER_URL", nil),
 				Description: "URL of the root of the target Chef server or organization.",
+				ValidateFunc: validateServerURL,
 			},
 			"client_name": {
 				Type:        schema.TypeString,
@@ -63,6 +64,14 @@ func Provider() terraform.ResourceProvider {
 	}
 }
 
+func validateServerURL(val interface{}, key string) (warns []string, errs []error) {
+	url := val.(string)
+	if !strings.HasSuffix(url, "/") {
+		errs = append(errs, fmt.Errorf("Chef Server URL %s must end with a slash", url))
+	}
+	return
+}
+
 func providerConfigure(d *schema.ResourceData) (interface{}, error) {
 	config := &chefc.Config{
 		Name:    d.Get("client_name").(string),