diff --git a/Engine/VariableAnalysis.cs b/Engine/VariableAnalysis.cs
index 5445df4bc..7c29c170f 100644
--- a/Engine/VariableAnalysis.cs
+++ b/Engine/VariableAnalysis.cs
@@ -86,7 +86,7 @@ private void ProcessParameters(IEnumerable<ParameterAst> parameters)
                             type = paramAst.TypeName.GetReflectionType();
                         }
 
-                        if (String.Equals(paramAst.TypeName.FullName, "switch", StringComparison.OrdinalIgnoreCase))
+                        if (paramAst.TypeName.GetReflectionType() == typeof(System.Management.Automation.SwitchParameter))
                         {
                             isSwitchOrMandatory = true;
                         }
diff --git a/Tests/Rules/AvoidGlobalOrUnitializedVarsNoViolations.ps1 b/Tests/Rules/AvoidGlobalOrUnitializedVarsNoViolations.ps1
index 432dd1a91..ea436bb4f 100644
--- a/Tests/Rules/AvoidGlobalOrUnitializedVarsNoViolations.ps1
+++ b/Tests/Rules/AvoidGlobalOrUnitializedVarsNoViolations.ps1
@@ -31,6 +31,13 @@ $proc[0]
 
 function Test-PreferenceVariable
 {
+    Param(
+        [switch]
+        $a,
+
+        [System.Management.Automation.SwitchParameter]
+        $b
+    )
 
    if (-not $PSBoundParameters.ContainsKey('Verbose')) {
        $VerbosePreference = $PSCmdlet.GetVariableValue('VerbosePreference') -as 

@@ -38,4 +45,4 @@ function Test-PreferenceVariable
         }
 
         $VerbosePreference
-    }
\ No newline at end of file
+}
\ No newline at end of file