diff --git a/build/NuSpecs/tools/install.core.ps1 b/build/NuSpecs/tools/install.core.ps1
index 1fa9352be7..6213957221 100644
--- a/build/NuSpecs/tools/install.core.ps1
+++ b/build/NuSpecs/tools/install.core.ps1
@@ -63,6 +63,7 @@ if ($project) {
 		if(Test-Path $umbracoBinFolder\MiniProfiler.dll) { Remove-Item $umbracoBinFolder\MiniProfiler.dll -Force -Confirm:$false }
 		if(Test-Path $umbracoBinFolder\MySql.Data.dll) { Remove-Item $umbracoBinFolder\MySql.Data.dll -Force -Confirm:$false }
 		if(Test-Path $umbracoBinFolder\Newtonsoft.Json.dll) { Remove-Item $umbracoBinFolder\Newtonsoft.Json.dll -Force -Confirm:$false }
+		if(Test-Path $umbracoBinFolder\System.Web.Helpers.dll) { Remove-Item $umbracoBinFolder\System.Web.Helpers.dll -Force -Confirm:$false }
 		if(Test-Path $umbracoBinFolder\System.Net.Http.Formatting.dll) { Remove-Item $umbracoBinFolder\System.Net.Http.Formatting.dll -Force -Confirm:$false }
 		if(Test-Path $umbracoBinFolder\System.Web.Http.dll) { Remove-Item $umbracoBinFolder\System.Web.Http.dll -Force -Confirm:$false }
 		if(Test-Path $umbracoBinFolder\System.Web.Http.WebHost.dll) { Remove-Item $umbracoBinFolder\System.Web.Http.WebHost.dll -Force -Confirm:$false }