diff --git a/Include/WinVer.nsh b/Include/WinVer.nsh
index fc32d114..ea41ff89 100644
--- a/Include/WinVer.nsh
+++ b/Include/WinVer.nsh
@@ -543,6 +543,7 @@
   !insertmacro WinVer_WaaS "${id}" 18363 1909 "19H2"        "November 2019 Update" ; 18363.418
   !insertmacro WinVer_WaaS "${id}" 19041 2004 "20H1"        "May 2020 Update" ; 19041.264?
   !insertmacro WinVer_WaaS "${id}" 19042 20H2 "20H2"        "October 2020 Update" ; 19042.572? A.K.A. 2009
+  !insertmacro WinVer_WaaS "${id}" 19043 21H1 "21H1"        "May 2021 Update" ; 19043.928
 
   !ifmacrodef WinVerExternal_WaaS_MapToBuild
     !insertmacro WinVerExternal_WaaS_MapToBuild ${op} "${id}" WinVer_WaaS_Build