diff --git a/google/resource_runtimeconfig_config.go b/google/resource_runtimeconfig_config.go
index 151b6c4c..45134504 100644
--- a/google/resource_runtimeconfig_config.go
+++ b/google/resource_runtimeconfig_config.go
@@ -26,7 +26,7 @@ func resourceRuntimeconfigConfig() *schema.Resource {
 				Type:         schema.TypeString,
 				Required:     true,
 				ForceNew:     true,
-				ValidateFunc: validateGCPName,
+				ValidateFunc: validateRegexp("[0-9A-Za-z](?:[_.A-Za-z0-9-]{0,62}[_.A-Za-z0-9])?"),
 			},
 
 			"description": {