diff --git a/windows/src/engine/kmcomapi/processes/keyboard/Keyman.System.MitigateWin10_1803LanguageInstall.pas b/windows/src/engine/kmcomapi/processes/keyboard/Keyman.System.MitigateWin10_1803LanguageInstall.pas
index 86cea39115..bbf5a72ace 100644
--- a/windows/src/engine/kmcomapi/processes/keyboard/Keyman.System.MitigateWin10_1803LanguageInstall.pas
+++ b/windows/src/engine/kmcomapi/processes/keyboard/Keyman.System.MitigateWin10_1803LanguageInstall.pas
@@ -98,7 +98,10 @@ class function TMitigateWin10_1803.IsMitigationRequired(BCP47Tag: string;
 var
   I: Integer;
 begin
-  if not IsWindows10_1803_OrGreater then
+  if not IsWindows10_OrGreater_Build(WINDOWS_10_BUILDNUMBER_WithFailure) then
+    Exit(False);
+
+  if IsWindows10_OrGreater_Build(WINDOWS_10_BUILDNUMBER_Fixed) then
     Exit(False);
 
   // We only want to look at the primary language tag for comparison