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-rw-r--r--py/mphal.h4
1 files changed, 4 insertions, 0 deletions
diff --git a/py/mphal.h b/py/mphal.h
index 92de01d08..66d80705a 100644
--- a/py/mphal.h
+++ b/py/mphal.h
@@ -34,6 +34,10 @@
#include <mphalport.h>
#endif
+#ifndef mp_hal_stdio_poll
+uintptr_t mp_hal_stdio_poll(uintptr_t poll_flags);
+#endif
+
#ifndef mp_hal_stdin_rx_chr
int mp_hal_stdin_rx_chr(void);
#endif