diff --git a/src/Windows/Perspex.Designer/Comm/ProcessHost.cs b/src/Windows/Perspex.Designer/Comm/ProcessHost.cs
index aa0b85ce33..700a2c8f34 100644
--- a/src/Windows/Perspex.Designer/Comm/ProcessHost.cs
+++ b/src/Windows/Perspex.Designer/Comm/ProcessHost.cs
@@ -102,7 +102,8 @@ namespace Perspex.Designer.Comm
                 {
                     UseShellExecute = false,
                     RedirectStandardInput = true,
-                    RedirectStandardOutput = true
+                    RedirectStandardOutput = true,
+                    RedirectStandardError = true
                 },
                 EnableRaisingEvents = true
             };