diff --git a/src/OmniSharp.DotNet/DotNetProjectSystem.cs b/src/OmniSharp.DotNet/DotNetProjectSystem.cs
index c44483210a..95f03a1df5 100644
--- a/src/OmniSharp.DotNet/DotNetProjectSystem.cs
+++ b/src/OmniSharp.DotNet/DotNetProjectSystem.cs
@@ -348,6 +348,7 @@ private void UpdateCompilationOption(ProjectState state)
             }
 
             var csharpOptions = new CSharpCompilationOptions(outputKind)
+                .WithAssemblyIdentityComparer(DesktopAssemblyIdentityComparer.Default)
                 .WithAllowUnsafe(option.AllowUnsafe ?? false)
                 .WithPlatform(ParsePlatfrom(option.Platform))
                 .WithGeneralDiagnosticOption(generalDiagnosticOpt)