diff --git a/src/Workspaces/Remote/ServiceHub/Host/RemoteWorkspace.SolutionCreator.cs b/src/Workspaces/Remote/ServiceHub/Host/RemoteWorkspace.SolutionCreator.cs
index 3f417f6d07f0c..ca3315194f902 100644
--- a/src/Workspaces/Remote/ServiceHub/Host/RemoteWorkspace.SolutionCreator.cs
+++ b/src/Workspaces/Remote/ServiceHub/Host/RemoteWorkspace.SolutionCreator.cs
@@ -280,7 +280,7 @@ await _assetProvider.GetAssetsAsync<CompilationOptions>(
                 // efficiently in bulk and in parallel.
                 await _assetProvider.SynchronizeProjectAssetsAsync(projectStateChecksumsToAdd, cancellationToken).ConfigureAwait(false);
 
-                using var _3 = ArrayBuilder<ProjectInfo>.GetInstance(out var projectInfos);
+                using var _3 = ArrayBuilder<ProjectInfo>.GetInstance(projectStateChecksumsToAdd.Count, out var projectInfos);
                 foreach (var (projectId, newProjectChecksums) in newProjectIdToStateChecksums)
                 {
                     if (!oldProjectIdToStateChecksums.ContainsKey(projectId))