@@ -209,11 +209,11 @@ struct x509_object x509; int read_ret; read_ret = asn1_x509_read_object(x509_der_buf, x509_der_buf_len, &x509); if (read_ret != 0) { - CACKEY_DEBUG_PRINTF("Unable to read serial number from a %lu byte buffer", x509_der_buf_len); + CACKEY_DEBUG_PRINTF("Unable to read serial number from a %lu byte buffer", (unsigned long) x509_der_buf_len); CACKEY_DEBUG_PRINTBUF("X.509 DER:", x509_der_buf, x509_der_buf_len); return(-1); }