diff --git a/src/Discord.Net/Helpers/Mention.cs b/src/Discord.Net/Helpers/Mention.cs
index a6d3db6aa..ec3eb9325 100644
--- a/src/Discord.Net/Helpers/Mention.cs
+++ b/src/Discord.Net/Helpers/Mention.cs
@@ -72,7 +72,7 @@ namespace Discord
 			if (source == null) throw new ArgumentNullException(nameof(source));
 			if (text == null) throw new ArgumentNullException(nameof(text));
 
-			return Resolve(source.Server, text);
+			return Resolve(source?.Server, text);
         }
 
 		/// <summary>Resolves all mentions in a provided string to those users, channels or roles' names.</summary>