diff --git a/src/Nimbus/ConcurrentCollections/ThreadSafeDictionary.cs b/src/Nimbus/ConcurrentCollections/ThreadSafeDictionary.cs
index 14532bd..1ea3505 100644
--- a/src/Nimbus/ConcurrentCollections/ThreadSafeDictionary.cs
+++ b/src/Nimbus/ConcurrentCollections/ThreadSafeDictionary.cs
@@ -52,7 +52,7 @@ public bool TryRemove(TKey key, out TValue value)
             {
                 lock (_dictionary)
                 {
-                    if (_dictionary.ContainsKey(key)) return false;
+                    if (!_dictionary.ContainsKey(key)) return false;
 
                     value = _dictionary[key];
                     _dictionary.Remove(key);
@@ -129,4 +129,4 @@ private object LockForKey(TKey key)
             }
         }
     }
-}
\ No newline at end of file
+}