diff --git a/src/NSubstitute.Analyzers.CSharp/DiagnosticAnalyzers/CallInfoAnalyzer.cs b/src/NSubstitute.Analyzers.CSharp/DiagnosticAnalyzers/CallInfoAnalyzer.cs
index 572b9cef..d27d4c76 100644
--- a/src/NSubstitute.Analyzers.CSharp/DiagnosticAnalyzers/CallInfoAnalyzer.cs
+++ b/src/NSubstitute.Analyzers.CSharp/DiagnosticAnalyzers/CallInfoAnalyzer.cs
@@ -65,8 +65,8 @@ protected override SyntaxNode GetAssignmentExpression(ElementAccessExpressionSyn
 
         protected override ISymbol GetIndexerSymbol(SyntaxNodeAnalysisContext syntaxNodeAnalysisContext, ElementAccessExpressionSyntax indexerExpressionSyntax)
         {
-            var info = syntaxNodeAnalysisContext.SemanticModel.GetSymbolInfo(indexerExpressionSyntax.Parent.DescendantNodes().First());
-            return info.Symbol;
+            return syntaxNodeAnalysisContext.SemanticModel.GetSymbolInfo(indexerExpressionSyntax).Symbol ??
+                   syntaxNodeAnalysisContext.SemanticModel.GetSymbolInfo(indexerExpressionSyntax.Expression).Symbol;
         }
 
         protected override int? GetArgAtPosition(SyntaxNodeAnalysisContext syntaxNodeAnalysisContext, InvocationExpressionSyntax invocationExpressionSyntax)