diff --git a/windows/build.ps1 b/windows/build.ps1
index abc139e2..56618533 100644
--- a/windows/build.ps1
+++ b/windows/build.ps1
@@ -75,6 +75,10 @@ if (-Not (Test-Path $GPG)) {
 }
 
 # Override CMAKE_SYSTEM_VERSION if $WinSDK is set.
+if ($Arch -eq "ARM" -and [string]::IsNullOrEmpty($WinSDK)) {
+	# 10.0.261000.0 appear to have dropped ARM32 support
+	$WinSDK = '10.0.22621.0'
+}
 if (-Not ([string]::IsNullOrEmpty($WinSDK))) {
 	$CMAKE_SYSTEM_VERSION = "-DCMAKE_SYSTEM_VERSION='$WinSDK'"
 } else {