diff --git a/Content.Server/Fax/FaxSystem.cs b/Content.Server/Fax/FaxSystem.cs
index ad8f4195f41..3344b69594f 100644
--- a/Content.Server/Fax/FaxSystem.cs
+++ b/Content.Server/Fax/FaxSystem.cs
@@ -593,7 +593,7 @@ public sealed class FaxSystem : EntitySystem
         // This will seem odd that we're doing the same if statement twice BUT if its not in the known fax machine list, the
         // sending fax might not have been online when the current fax machine was refreshed/init'd. So, if its already known,
         // we don't need to refresh. But if its not known, let's attempt to refresh first, then check the fromAddress in the KnownFaxes.
-        if (fromAddress != null && component.KnownFaxes.TryGetValue(fromAddress, out var _))
+        if (fromAddress != null && !component.KnownFaxes.TryGetValue(fromAddress, out var _))
             Refresh(uid, component);
         // END DeltaV