diff --git a/src/Microsoft.Identity.Web/Resource/RequiredScopeFilter.cs b/src/Microsoft.Identity.Web/Resource/RequiredScopeFilter.cs
index 9aada24b6..5aa7ba344 100644
--- a/src/Microsoft.Identity.Web/Resource/RequiredScopeFilter.cs
+++ b/src/Microsoft.Identity.Web/Resource/RequiredScopeFilter.cs
@@ -50,7 +50,7 @@ public void OnAuthorization(AuthorizationFilterContext context)
 
         private void ValidateEffectiveScopes(AuthorizationFilterContext context)
         {
-            if (_effectiveAcceptedScopes == null || _effectiveAcceptedScopes.Length > 0)
+            if (_effectiveAcceptedScopes == null || _effectiveAcceptedScopes.Length < 0)
             {
                 throw new InvalidOperationException(IDWebErrorMessage.MissingRequiredScopesForAuthorizationFilter);
             }