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-rw-r--r--mpy-cross/main.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/mpy-cross/main.c b/mpy-cross/main.c
index e4c4104c6..d4690470e 100644
--- a/mpy-cross/main.c
+++ b/mpy-cross/main.c
@@ -47,7 +47,7 @@ mp_uint_t mp_verbose_flag = 0;
// Make it larger on a 64 bit machine, because pointers are larger.
long heap_size = 1024 * 1024 * (sizeof(mp_uint_t) / 4);
-STATIC void stderr_print_strn(void *env, const char *str, mp_uint_t len) {
+STATIC void stderr_print_strn(void *env, const char *str, size_t len) {
(void)env;
ssize_t dummy = write(STDERR_FILENO, str, len);
(void)dummy;