diff --git a/error.c b/error.c index 8c3aaded95..6b858c19fe 100644 --- a/error.c +++ b/error.c @@ -524,7 +524,7 @@ bug_report_begin_valist(FILE *out, const char *fmt, va_list args) #if RUBY_DEVEL const char *cmd = getenv("RUBY_ON_BUG"); if (cmd) { - snprintf(buf, sizeof(buf), "%s %d", cmd, getpid()); + snprintf(buf, sizeof(buf), "%s %"PRI_PIDT_PREFIX"d", cmd, getpid()); int r = system(buf); if (r == -1) { snprintf(buf, sizeof(buf), "Launching RUBY_ON_BUG command failed.");