diff --git a/src/libraries/System.ComponentModel.Composition/src/System/ComponentModel/Composition/ReflectionModel/ReflectionComposablePart.cs b/src/libraries/System.ComponentModel.Composition/src/System/ComponentModel/Composition/ReflectionModel/ReflectionComposablePart.cs
index c8a7054c5966c..609511bb33bff 100644
--- a/src/libraries/System.ComponentModel.Composition/src/System/ComponentModel/Composition/ReflectionModel/ReflectionComposablePart.cs
+++ b/src/libraries/System.ComponentModel.Composition/src/System/ComponentModel/Composition/ReflectionModel/ReflectionComposablePart.cs
@@ -87,6 +87,7 @@ private Dictionary<ImportDefinition, ImportingItem> ImportsCache
                 {
                     lock (_lock)
                     {
+                        value = _importsCache;
                         if (value == null)
                         {
                             value = new Dictionary<ImportDefinition, ImportingItem>();