diff --git a/script/prepare_externals.bat b/script/prepare_externals.bat
index c41d463..ca54313 100755
--- a/script/prepare_externals.bat
+++ b/script/prepare_externals.bat
@@ -126,7 +126,7 @@ cd "%CC_ASN1_COMMSDSL_SRC_DIR%"
 echo "Building cc.asn1.commsdsl ..."
 mkdir "%CC_ASN1_COMMSDSL_BUILD_DIR%"
 cd %CC_ASN1_COMMSDSL_BUILD_DIR%
-cmake -G %GENERATOR% %PLATFORM_PARAM% -S %CC_ASN1_COMMSDSL_SRC_DIR% -B %CC_ASN1_COMMSDSL_BUILD_DIR% ^
+cmake %GENERATOR_PARAM% %PLATFORM_PARAM% -S %CC_ASN1_COMMSDSL_SRC_DIR% -B %CC_ASN1_COMMSDSL_BUILD_DIR% ^
     -DCMAKE_INSTALL_PREFIX=%CC_ASN1_COMMSDSL_INSTALL_DIR% -DCMAKE_BUILD_TYPE=%COMMON_BUILD_TYPE% ^
     -DCMAKE_CXX_STANDARD=%COMMON_CXX_STANDARD%
 if %errorlevel% neq 0 exit /b %errorlevel%