diff --git a/mk/windows/set-env-2015.bat b/mk/windows/set-env-2015.bat
index 69003ca01..f42042028 100644
--- a/mk/windows/set-env-2015.bat
+++ b/mk/windows/set-env-2015.bat
@@ -5,7 +5,6 @@ SET PLATFORM=x64
 SET TOOLSET=v140
 
 ECHO Setting up Visual Studio 2015 environment vars...
-SET Platform=
 if "%DevEnvDir%." == "." goto SETVCVARS
 GOTO GITSECTION
 
diff --git a/mk/windows/set-env-2017.bat b/mk/windows/set-env-2017.bat
index ad2568e97..fbc829be0 100644
--- a/mk/windows/set-env-2017.bat
+++ b/mk/windows/set-env-2017.bat
@@ -5,7 +5,6 @@ SET PLATFORM=x64
 SET TOOLSET=v141
 
 ECHO Setting up Visual Studio 2017 environment vars...
-SET Platform=
 if "%DevEnvDir%." == "." goto SETVCVARS
 GOTO GITSECTION