diff --git a/org.eclipse.buildship.core/src/main/java/org/eclipse/buildship/core/internal/operation/DefaultToolingApiOperationManager.java b/org.eclipse.buildship.core/src/main/java/org/eclipse/buildship/core/internal/operation/DefaultToolingApiOperationManager.java
index 2f4800680..77cd37038 100644
--- a/org.eclipse.buildship.core/src/main/java/org/eclipse/buildship/core/internal/operation/DefaultToolingApiOperationManager.java
+++ b/org.eclipse.buildship.core/src/main/java/org/eclipse/buildship/core/internal/operation/DefaultToolingApiOperationManager.java
@@ -36,7 +36,11 @@ public void run(ToolingApiOperation runnable, IProgressMonitor monitor) throws C
     @Override
     public void run(ToolingApiOperation runnable, CancellationTokenSource tokenSource, IProgressMonitor monitor) throws CoreException {
         IProgressMonitor efficientMonitor = new RateLimitingProgressMonitor(monitor, 500, TimeUnit.MILLISECONDS);
-        ResourcesPlugin.getWorkspace().run(new WorkspaceRunnableAdapter(runnable, tokenSource), runnable.getRule(), 0, efficientMonitor);
+        try {
+            ResourcesPlugin.getWorkspace().run(new WorkspaceRunnableAdapter(runnable, tokenSource), runnable.getRule(), 0, efficientMonitor);
+        } finally {
+            efficientMonitor.done();
+        }
     }
 
     /**