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-rw-r--r--src/core/os.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/core/os.c b/src/core/os.c
index 21510575..bc7b7bd6 100644
--- a/src/core/os.c
+++ b/src/core/os.c
@@ -1332,7 +1332,7 @@ static Janet os_execute_impl(int32_t argc, Janet *argv, JanetExecuteMode mode) {
msgbuf,
sizeof(msgbuf),
NULL);
- if (!*msgbuf) snprintf(msgbuf, sizeof(msgbuf), "%" PRIu32, cp_error_code);
+ if (!*msgbuf) snprintf(msgbuf, sizeof(msgbuf), "%" PRIu32, (uint32_t) cp_error_code);
char *c = msgbuf;
while (*c) {
if (*c == '\n' || *c == '\r') {