diff --git a/src/MethodBoundaryAspect.Fody/InstructionBlockChainCreator.cs b/src/MethodBoundaryAspect.Fody/InstructionBlockChainCreator.cs
index 1e56eae..852f1f5 100644
--- a/src/MethodBoundaryAspect.Fody/InstructionBlockChainCreator.cs
+++ b/src/MethodBoundaryAspect.Fody/InstructionBlockChainCreator.cs
@@ -113,8 +113,7 @@ public NamedInstructionBlockChain CreateMethodExecutionArgsInstance(
             var createThisVariableBlock = CreateThisVariable();
 
             // MethodExecutionArgs instance
-            var onEntryMethodTypeRef =
-                anyAspectTypeDefinition.Resolve().BaseType.Resolve().Methods.Single(AspectMethodCriteria.IsOnEntryMethod);
+            var onEntryMethodTypeRef = _referenceFinder.GetMethodReference(anyAspectTypeDefinition, AspectMethodCriteria.IsOnEntryMethod);
             var firstParameterType = onEntryMethodTypeRef.Parameters.Single().ParameterType;
             var methodExecutionArgsTypeRef = _moduleDefinition.ImportReference(firstParameterType);
             
@@ -433,4 +432,4 @@ private static MethodReference FixMethodReference(TypeReference declaringType, M
             return targetMethod;
         }
     }
-}
\ No newline at end of file
+}