diff --git a/py/qstrdefs.h b/py/qstrdefs.h
index 7bd8dc653a..6075000166 100644
--- a/py/qstrdefs.h
+++ b/py/qstrdefs.h
@@ -269,3 +269,10 @@ Q(encode)
 Q(decode)
 Q(utf-8)
 #endif
+
+#if MICROPY_ENABLE_MOD_SYS
+Q(argv)
+Q(stdin)
+Q(stdout)
+Q(stderr)
+#endif
diff --git a/unix/qstrdefsport.h b/unix/qstrdefsport.h
index a4772a2be9..42f20d2657 100644
--- a/unix/qstrdefsport.h
+++ b/unix/qstrdefsport.h
@@ -2,10 +2,6 @@
 
 Q(Test)
 
-Q(argv)
-Q(stdin)
-Q(stdout)
-Q(stderr)
 Q(rawsocket)
 Q(socket)
 Q(sockaddr_in)