diff --git a/build_files/scons/tools/btools.py b/build_files/scons/tools/btools.py
index 8db39833451..aeb4a33eea9 100644
--- a/build_files/scons/tools/btools.py
+++ b/build_files/scons/tools/btools.py
@@ -136,7 +136,7 @@ def validate_arguments(args, bc):
             'BF_CXX', 'WITH_BF_STATICCXX', 'BF_CXX_LIB_STATIC',
             'BF_TWEAK_MODE', 'BF_SPLIT_SRC',
             'WITHOUT_BF_INSTALL',
-            'WITHOUT_BF_PYTHON_INSTALL', 'WITHOUT_BF_PYTHON_UNPACK', 'WITH_BF_PYTHON_INSTALL_NUMPY'
+            'WITHOUT_BF_PYTHON_INSTALL', 'WITHOUT_BF_PYTHON_UNPACK', 'WITH_BF_PYTHON_INSTALL_NUMPY',
             'WITHOUT_BF_OVERWRITE_INSTALL',
             'WITH_BF_OPENMP', 'BF_OPENMP', 'BF_OPENMP_LIBPATH', 'WITH_BF_STATICOPENMP', 'BF_OPENMP_STATIC_STATIC',
             'WITH_GHOST_COCOA',