diff --git a/server/src/main/java/io/druid/initialization/Initialization.java b/server/src/main/java/io/druid/initialization/Initialization.java
index c43f0d5ec7c..a6dbee5bcf6 100644
--- a/server/src/main/java/io/druid/initialization/Initialization.java
+++ b/server/src/main/java/io/druid/initialization/Initialization.java
@@ -28,13 +28,12 @@ import com.google.inject.Key;
 import com.google.inject.Module;
 import com.google.inject.util.Modules;
 import com.metamx.common.ISE;
-import com.metamx.common.logger.Logger;
 import com.metamx.common.StringUtils;
+import com.metamx.common.logger.Logger;
 import io.druid.curator.CuratorModule;
 import io.druid.curator.discovery.DiscoveryModule;
 import io.druid.guice.AWSModule;
 import io.druid.guice.AnnouncerModule;
-import io.druid.metadata.storage.derby.DerbyMetadataStorageDruidModule;
 import io.druid.guice.DruidProcessingModule;
 import io.druid.guice.DruidSecondaryModule;
 import io.druid.guice.ExtensionsConfig;
@@ -54,6 +53,7 @@ import io.druid.guice.annotations.Client;
 import io.druid.guice.annotations.Json;
 import io.druid.guice.annotations.Smile;
 import io.druid.guice.http.HttpClientModule;
+import io.druid.metadata.storage.derby.DerbyMetadataStorageDruidModule;
 import io.druid.server.initialization.EmitterModule;
 import io.druid.server.initialization.jetty.JettyServerModule;
 import io.druid.server.metrics.MetricsModule;
@@ -158,7 +158,11 @@ public class Initialization
     return retVal;
   }
 
-  public static URLClassLoader getClassLoaderForCoordinates(TeslaAether aether, String coordinate, String defaultVersion)
+  public static URLClassLoader getClassLoaderForCoordinates(
+      TeslaAether aether,
+      String coordinate,
+      String defaultVersion
+  )
       throws DependencyResolutionException, MalformedURLException
   {
     URLClassLoader loader = loadersMap.get(coordinate);
@@ -310,14 +314,15 @@ public class Initialization
 
                 }
               }
-          , false, StringUtils.UTF8_STRING)
+              , false, StringUtils.UTF8_STRING
+          )
       );
       return new DefaultTeslaAether(
           config.getLocalRepository(),
           remoteRepositories.toArray(new Repository[remoteRepositories.size()])
       );
     }
-    catch(UnsupportedEncodingException e) {
+    catch (UnsupportedEncodingException e) {
       // should never happen
       throw new IllegalStateException(e);
     }
@@ -361,12 +366,15 @@ public class Initialization
       actualModules.addModule(module);
     }
 
+    Module intermediateModules = Modules.override(defaultModules.getModules()).with(actualModules.getModules());
+
+    ModuleList extensionModules = new ModuleList(baseInjector);
     final ExtensionsConfig config = baseInjector.getInstance(ExtensionsConfig.class);
     for (DruidModule module : Initialization.getFromExtensions(config, DruidModule.class)) {
-      actualModules.addModule(module);
+      extensionModules.addModule(module);
     }
 
-    return Guice.createInjector(Modules.override(defaultModules.getModules()).with(actualModules.getModules()));
+    return Guice.createInjector(Modules.override(intermediateModules).with(extensionModules.getModules()));
   }
 
   private static class ModuleList