diff --git a/src/D2L.CodeStyle.Analyzers/ApiUsage/ConstantAttributeAnalyzer.cs b/src/D2L.CodeStyle.Analyzers/ApiUsage/ConstantAttributeAnalyzer.cs
index a47a9de6..79490eae 100644
--- a/src/D2L.CodeStyle.Analyzers/ApiUsage/ConstantAttributeAnalyzer.cs
+++ b/src/D2L.CodeStyle.Analyzers/ApiUsage/ConstantAttributeAnalyzer.cs
@@ -133,7 +133,7 @@ ISymbol constantAttribute
 			}
 
 			// Argument was defined as [Constant] already, so trust it
-			var argumentSymbol = argument.SemanticModel.GetSymbolInfo( (argument.Syntax as ArgumentSyntax).Expression, context.CancellationToken ).Symbol;
+			var argumentSymbol = argument.SemanticModel.GetSymbolInfo( argument.Value.Syntax, context.CancellationToken ).Symbol;
 			if( argumentSymbol != null && HasAttribute( argumentSymbol, constantAttribute ) ) {
 				return;
 			}