diff --git a/build.psm1 b/build.psm1
index cafe54a6c..3ccd7ecc2 100644
--- a/build.psm1
+++ b/build.psm1
@@ -46,7 +46,7 @@ function Start-PSBuild {
         [switch]$FullCLR,
 
         [Parameter(ParameterSetName='FullCLR')]
-        [string]$cmakeGenerator = "Visual Studio 14 2015",
+        [string]$cmakeGenerator = "Visual Studio 14 2015 Win64",
 
         [Parameter(ParameterSetName='FullCLR')]
         [ValidateSet("Debug",