diff --git a/src/Identity/Core/src/SignInManager.cs b/src/Identity/Core/src/SignInManager.cs
index d475e89f695e..c29b79e74dda 100644
--- a/src/Identity/Core/src/SignInManager.cs
+++ b/src/Identity/Core/src/SignInManager.cs
@@ -129,7 +129,7 @@ public virtual bool IsSignedIn(ClaimsPrincipal principal)
             {
                 throw new ArgumentNullException(nameof(principal));
             }
-            return principal?.Identities != null &&
+            return principal.Identities != null &&
                 principal.Identities.Any(i => i.AuthenticationType == IdentityConstants.ApplicationScheme);
         }