diff --git a/Rules/UseUsingScopeModifierInNewRunspaces.cs b/Rules/UseUsingScopeModifierInNewRunspaces.cs
index 6d665e989..18839fcb8 100644
--- a/Rules/UseUsingScopeModifierInNewRunspaces.cs
+++ b/Rules/UseUsingScopeModifierInNewRunspaces.cs
@@ -217,7 +217,10 @@ private static HashSet<string> FindVarsInAssignmentAsts(Ast ast)
                     {
                         string variableName = string.Format(variable.VariablePath.UserPath,
                             StringComparer.OrdinalIgnoreCase);
-                        variableDictionary.Add(variableName);
+                        if (!variableDictionary.ContainsKey(variableName))
+                        {
+                            variableDictionary.Add(variableName, variable);
+                        }
                     }
                 };