diff --git a/builds/install/arch-specific/win32/BuildExecutableInstall.bat b/builds/install/arch-specific/win32/BuildExecutableInstall.bat
index 0a564448979..98c82e63b67 100644
--- a/builds/install/arch-specific/win32/BuildExecutableInstall.bat
+++ b/builds/install/arch-specific/win32/BuildExecutableInstall.bat
@@ -612,7 +612,7 @@ goto :EOF
 )
 @echo Generating md5sums for Firebird-%PRODUCT_VER_STRING%-%FBBUILD_PACKAGE_NUMBER%
 
-%GNU_TOOLCHAIN%\md5sum.exe %FBBUILD_INSTALL_IMAGES%\Firebird-%PRODUCT_VER_STRING%?%FBBUILD_PACKAGE_NUMBER%*.* > %FBBUILD_INSTALL_IMAGES%\Firebird-%PRODUCT_VER_STRING%-%FBBUILD_PACKAGE_NUMBER%.md5sum
+%MD5_COMMAND% %FBBUILD_INSTALL_IMAGES%\Firebird-%PRODUCT_VER_STRING%?%FBBUILD_PACKAGE_NUMBER%*.* > %FBBUILD_INSTALL_IMAGES%\Firebird-%PRODUCT_VER_STRING%-%FBBUILD_PACKAGE_NUMBER%.md5sum
 
 ::End of DO_MD5SUMS
 ::-----------------
diff --git a/builds/install/arch-specific/win32/FirebirdInstall_30.iss b/builds/install/arch-specific/win32/FirebirdInstall_30.iss
index 523fbbff1ef..aadc2033694 100644
--- a/builds/install/arch-specific/win32/FirebirdInstall_30.iss
+++ b/builds/install/arch-specific/win32/FirebirdInstall_30.iss
@@ -200,7 +200,7 @@
 #if PlatformTarget == "x64"
 #define WOW64Dir="output_win32"
 #endif
-#define msvc_version 10
+#define msvc_version 0
 
 ;BaseVer should be used for all FB_MAJOR_VER.FB_MINOR_VER installs.
 ;This allows us to upgrade silently from FB_MAJOR_VER.FB_MINOR_VER.m to FB_MAJOR_VER.FB_MINOR_VER.n