diff --git a/src/Peachpie.CodeAnalysis/CodeGen/Symbols/SourceTypeSymbol.cs b/src/Peachpie.CodeAnalysis/CodeGen/Symbols/SourceTypeSymbol.cs
index 25a45fb51b..5a84edcc35 100644
--- a/src/Peachpie.CodeAnalysis/CodeGen/Symbols/SourceTypeSymbol.cs
+++ b/src/Peachpie.CodeAnalysis/CodeGen/Symbols/SourceTypeSymbol.cs
@@ -668,7 +668,7 @@ static bool CanBePropertyGetter(MethodSymbol method, out string propertyName)
 
         static bool CanBePropertySetter(MethodSymbol method)
         {
-            return method.IsStatic == false && method.ParameterCount == 1;
+            return method != null && method.IsStatic == false && method.ParameterCount == 1;
         }
 
         PropertySymbol SynthesizeProperty(Emit.PEModuleBuilder module, DiagnosticBag diagnostics, string propertyName, MethodSymbol getter, MethodSymbol setter)