diff --git a/core/site_scons/site_tools/micropython/qstrdefs.py b/core/site_scons/site_tools/micropython/qstrdefs.py
index 5e4e1f2bb..8560ec73b 100644
--- a/core/site_scons/site_tools/micropython/qstrdefs.py
+++ b/core/site_scons/site_tools/micropython/qstrdefs.py
@@ -1,17 +1,14 @@
 import re
 import sys
 
-QSTR_BLACKLIST = set(['NULL', 'number_of'])
-
 
 def process(source, target):
-    re_qstr = re.compile(r'MP_QSTR_[_a-zA-Z0-9]+')
+    re_qstr = re.compile(r"MP_QSTR_[_a-zA-Z0-9]+")
     for line in source:
         for match in re_qstr.findall(line):
-            name = match.replace('MP_QSTR_', '')
-            if name not in QSTR_BLACKLIST:
-                target.write('Q(%s)\n' % name)
+            name = match.replace("MP_QSTR_", "")
+            target.write("Q(%s)\n" % name)
 
 
-if __name__ == '__main__':
+if __name__ == "__main__":
     process(sys.stdin, sys.stdout)