diff --git a/jps/model-serialization/src/org/jetbrains/jps/model/serialization/JpsProjectLoader.java b/jps/model-serialization/src/org/jetbrains/jps/model/serialization/JpsProjectLoader.java
index b4420a2c7c18..5d0c197f9e29 100644
--- a/jps/model-serialization/src/org/jetbrains/jps/model/serialization/JpsProjectLoader.java
+++ b/jps/model-serialization/src/org/jetbrains/jps/model/serialization/JpsProjectLoader.java
@@ -294,7 +294,7 @@ public class JpsProjectLoader extends JpsLoaderBase {
     return JpsElementFactory.getInstance().createModule(name, loader.getType(), loader.loadProperties(component));
   }
 
-  private static JpsModulePropertiesSerializer<?> getModulePropertiesSerializer(@NotNull String typeId) {
+  private static JpsModulePropertiesSerializer<?> getModulePropertiesSerializer(@Nullable String typeId) {
     for (JpsModelSerializerExtension extension : JpsModelSerializerExtension.getExtensions()) {
       for (JpsModulePropertiesSerializer<?> loader : extension.getModulePropertiesSerializers()) {
         if (loader.getTypeId().equals(typeId)) {