diff --git a/org.eclipse.m2e.core.tests/src/org/eclipse/m2e/core/MavenBugsTest.java b/org.eclipse.m2e.core.tests/src/org/eclipse/m2e/core/MavenBugsTest.java
index 15e3a30c6..5f6f2eb47 100644
--- a/org.eclipse.m2e.core.tests/src/org/eclipse/m2e/core/MavenBugsTest.java
+++ b/org.eclipse.m2e.core.tests/src/org/eclipse/m2e/core/MavenBugsTest.java
@@ -11,6 +11,8 @@
 package org.eclipse.m2e.core;
 
 import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertFalse;
+import static org.junit.Assert.assertNotNull;
 
 import java.io.ByteArrayInputStream;
 import java.io.File;
@@ -20,7 +22,10 @@
 import java.util.Arrays;
 import java.util.List;
 
+import org.apache.maven.execution.MavenExecutionResult;
+import org.apache.maven.execution.MavenSession;
 import org.apache.maven.project.MavenProject;
+import org.apache.maven.project.ProjectBuildingRequest;
 import org.apache.maven.shared.utils.io.FileUtils;
 import org.eclipse.core.resources.IFile;
 import org.eclipse.core.resources.IMarker;
@@ -30,6 +35,8 @@
 import org.eclipse.core.resources.ResourcesPlugin;
 import org.eclipse.core.runtime.FileLocator;
 import org.eclipse.core.runtime.NullProgressMonitor;
+import org.eclipse.m2e.core.embedder.IMaven;
+import org.eclipse.m2e.core.embedder.IMavenExecutionContext;
 import org.eclipse.m2e.core.internal.MavenPluginActivator;
 import org.eclipse.m2e.core.project.IMavenProjectFacade;
 import org.eclipse.m2e.core.project.MavenProjectInfo;
@@ -107,4 +114,24 @@ public void testBuildStartTime() throws Exception {
 		IMarker[] markers = project.findMarkers(IMarker.PROBLEM, true, IResource.DEPTH_INFINITE);
 		assertEquals(Arrays.toString(markers), 0, markers.length);
 	}
+
+	@Test
+	public void testAllProjects() throws Exception {
+		IMaven maven = MavenPlugin.getMaven();
+		File pomFile = new File("resources/projects/simplePomOK/pom.xml");
+		IMavenExecutionContext context = maven.createExecutionContext();
+		MavenExecutionResult result = context.execute((context1, monitor1) -> {
+			ProjectBuildingRequest configuration = context.newProjectBuildingRequest();
+			configuration.setResolveDependencies(true);
+			return maven.readMavenProject(pomFile, configuration);
+		}, monitor);
+		assertFalse(result.hasExceptions());
+		MavenProject project = result.getProject();
+		result = context.execute(project, (context1, monitor) -> {
+			MavenSession session = context1.getSession();
+			assertNotNull("getProjects", session.getProjects());
+			assertNotNull("getAllProjects", session.getAllProjects());
+			return session.getResult();
+		}, monitor);
+	}
 }
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 9da7e2f95..978543572 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
@@ -359,6 +359,7 @@ private <V> V executeBare(MavenProject project, ICallable<V> callable, IProgress
         .setTransferListener(new ArtifactTransferListenerAdapter(monitor));
     final MavenProject origProject = mavenSession.getCurrentProject();
     final List<MavenProject> origProjects = mavenSession.getProjects();
+    final List<MavenProject> origAllProjects = mavenSession.getAllProjects();
     final ClassLoader origTCCL = Thread.currentThread().getContextClassLoader();
     try {
       if(project == null && projectSupplier != null) {
@@ -366,7 +367,9 @@ private <V> V executeBare(MavenProject project, ICallable<V> callable, IProgress
       }
       if(project != null) {
         mavenSession.setCurrentProject(project);
-        mavenSession.setProjects(Collections.singletonList(project));
+        List<MavenProject> projects = Collections.singletonList(project);
+        mavenSession.setProjects(projects);
+        mavenSession.setAllProjects(projects);
       }
       return callable.call(this, IProgressMonitor.nullSafe(monitor));
     } finally {
@@ -375,6 +378,7 @@ private <V> V executeBare(MavenProject project, ICallable<V> callable, IProgress
       if(project != null) {
         mavenSession.setCurrentProject(origProject);
         mavenSession.setProjects(origProjects != null ? origProjects : Collections.<MavenProject> emptyList());
+        mavenSession.setAllProjects(origAllProjects != null ? origAllProjects : Collections.<MavenProject> emptyList());
       }
     }
   }