diff --git a/src/coreclr/tools/aot/ILCompiler.ReadyToRun/Compiler/DependencyAnalysis/ReadyToRun/TransitionBlock.cs b/src/coreclr/tools/aot/ILCompiler.ReadyToRun/Compiler/DependencyAnalysis/ReadyToRun/TransitionBlock.cs
index 4ece51700d2cf3..561b52a85d0534 100644
--- a/src/coreclr/tools/aot/ILCompiler.ReadyToRun/Compiler/DependencyAnalysis/ReadyToRun/TransitionBlock.cs
+++ b/src/coreclr/tools/aot/ILCompiler.ReadyToRun/Compiler/DependencyAnalysis/ReadyToRun/TransitionBlock.cs
@@ -370,7 +370,7 @@ public void ComputeReturnValueTreatment(CorElementType type, TypeHandle thRetTyp
                                         fpReturnSize += 1;
                                     }
 
-                                    if (descriptor.eightByteClassifications0 == SystemVClassificationType.SystemVClassificationTypeSSE)
+                                    if (descriptor.eightByteClassifications1 == SystemVClassificationType.SystemVClassificationTypeSSE)
                                     {
                                         fpReturnSize += 2;
                                     }