diff --git a/org.eclipse.m2e.core/src/org/eclipse/m2e/core/internal/embedder/MavenExecutionContext.java b/org.eclipse.m2e.core/src/org/eclipse/m2e/core/internal/embedder/MavenExecutionContext.java
index 6d53f5a..b143101 100644
--- a/org.eclipse.m2e.core/src/org/eclipse/m2e/core/internal/embedder/MavenExecutionContext.java
+++ b/org.eclipse.m2e.core/src/org/eclipse/m2e/core/internal/embedder/MavenExecutionContext.java
@@ -168,6 +168,7 @@
         .createArtifactTransferListener(monitor));
     final MavenProject origProject = mavenSession.getCurrentProject();
     final List<MavenProject> origProjects = mavenSession.getProjects();
+    final ClassLoader origTCCL = Thread.currentThread().getContextClassLoader();
     try {
       if(project != null) {
         mavenSession.setCurrentProject(project);
@@ -175,6 +176,7 @@
       }
       return callable.call(this, monitor);
     } finally {
+      Thread.currentThread().setContextClassLoader(origTCCL);
       repositorySession.setTransferListener(origTransferListener);
       if(project != null) {
         mavenSession.setCurrentProject(origProject);