diff --git a/Rules/UseCorrectCasing.cs b/Rules/UseCorrectCasing.cs
index 3e1b4b2fd..d1f579731 100644
--- a/Rules/UseCorrectCasing.cs
+++ b/Rules/UseCorrectCasing.cs
@@ -73,8 +73,7 @@ public override IEnumerable<DiagnosticRecord> AnalyzeScript(Ast ast, string file
                 foreach (var commandParameterAst in commandParameterAsts)
                 {
                     var parameterName = commandParameterAst.ParameterName;
-                    var parameterMetaData = availableParameters[parameterName];
-                    if (parameterMetaData != null)
+                    if (availableParameters.TryGetValue(parameterName, out ParameterMetadata parameterMetaData))
                     {
                         var correctlyCasedParameterName = parameterMetaData.Name;
                         if (!parameterName.Equals(correctlyCasedParameterName, StringComparison.Ordinal))
diff --git a/Tests/Rules/UseCorrectCasing.tests.ps1 b/Tests/Rules/UseCorrectCasing.tests.ps1
index 968a93ae7..61d75b408 100644
--- a/Tests/Rules/UseCorrectCasing.tests.ps1
+++ b/Tests/Rules/UseCorrectCasing.tests.ps1
@@ -65,4 +65,9 @@ Describe "UseCorrectCasing" {
         Invoke-Formatter 'Invoke-DummyFunction -parametername: $parameterValue' |
             Should -Be 'Invoke-DummyFunction -ParameterName: $parameterValue'
     }
+
+    It "Should not throw when using parameter name that does not exist" {
+        Invoke-Formatter 'Get-Process -NonExistingParameterName' -ErrorAction Stop
+    }
+
 }