diff --git a/CMakeLists.txt b/CMakeLists.txt
index ef7506f..5b57637 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -2,6 +2,7 @@
 
 add_definitions (-DMCTP_LOG_STDERR)
 add_definitions (-DMCTP_HAVE_FILEIO)
+add_definitions (-DMCTP_HAVE_STDIO)
 
 add_library (libmctp STATIC alloc.c core.c log.c libmctp.h serial.c)
 
diff --git a/configure.ac b/configure.ac
index 82d9737..9ae4681 100644
--- a/configure.ac
+++ b/configure.ac
@@ -23,6 +23,7 @@
 # AC_ARG_WITH these in the future.
 AC_DEFINE([MCTP_HAVE_SYSLOG], [1], [Define to enable syslog])
 AC_DEFINE([MCTP_HAVE_FILEIO], [1], [Define to enable filesystem functions])
+AC_DEFINE([MCTP_HAVE_STDIO], [1], [Define to enable stdio functions])
 AC_DEFINE([MCTP_DEFAULT_ALLOC], [1],
     [Define to populate allocation functions to defaults (malloc/free)])
 
diff --git a/log.c b/log.c
index 4df529b..cbdbbca 100644
--- a/log.c
+++ b/log.c
@@ -1,7 +1,6 @@
 /* SPDX-License-Identifier: Apache-2.0 OR GPL-2.0-or-later */
 
 #include <stdarg.h>
-#include <stdio.h>
 
 #include "libmctp.h"
 #include "libmctp-log.h"
@@ -10,6 +9,10 @@
 #include "config.h"
 #endif
 
+#ifdef MCTP_HAVE_STDIO
+#include <stdio.h>
+#endif
+
 #ifdef MCTP_HAVE_SYSLOG
 #include <syslog.h>
 #endif
@@ -34,10 +37,12 @@
 	case MCTP_LOG_NONE:
 		break;
 	case MCTP_LOG_STDIO:
+#ifdef MCTP_HAVE_STDIO
 		if (level <= log_stdio_level) {
 			vfprintf(stderr, fmt, ap);
 			fputs("\n", stderr);
 		}
+#endif
 		break;
 	case MCTP_LOG_SYSLOG:
 #ifdef MCTP_HAVE_SYSLOG