diff --git a/windows/build.ps1 b/windows/build.ps1
index abc139e2..d44aaaf4 100644
--- a/windows/build.ps1
+++ b/windows/build.ps1
@@ -77,6 +77,9 @@ if (-Not (Test-Path $GPG)) {
 # Override CMAKE_SYSTEM_VERSION if $WinSDK is set.
 if (-Not ([string]::IsNullOrEmpty($WinSDK))) {
 	$CMAKE_SYSTEM_VERSION = "-DCMAKE_SYSTEM_VERSION='$WinSDK'"
+} else if ($Arch -eq "ARM") {
+	# 10.0.261000.0 appear to have dropped ARM32 support
+	$CMAKE_SYSTEM_VERSION = "-DCMAKE_SYSTEM_VERSION='10.0.22621.0'"
 } else {
 	$CMAKE_SYSTEM_VERSION = ''
 }