diff --git a/py/qstr.c b/py/qstr.c
index ef31a68..24793ff 100644
--- a/py/qstr.c
+++ b/py/qstr.c
@@ -93,9 +93,11 @@
     10,                 // set so that the first dynamically allocated pool is twice this size; must be <= the len (just below)
     MP_QSTRnumber_of,   // corresponds to number of strings in array just below
     {
+#ifndef __QSTR_EXTRACT
 #define QDEF(id, str) str,
 #include "genhdr/qstrdefs.generated.h"
 #undef QDEF
+#endif
     },
 };