diff --git a/src/logging.c b/src/logging.c
index 741b64e6..e18a0763 100644
--- a/src/logging.c
+++ b/src/logging.c
@@ -17,6 +17,7 @@ Contributors:
 */
 #include "config.h"
 
+#include <inttypes.h>
 #include <stdarg.h>
 #include <stdio.h>
 #include <string.h>
diff --git a/src/mosquitto.c b/src/mosquitto.c
index cb381acf..52964366 100644
--- a/src/mosquitto.c
+++ b/src/mosquitto.c
@@ -40,6 +40,7 @@ Contributors:
 #endif
 
 #include <errno.h>
+#include <limits.h>
 #include <signal.h>
 #include <stdio.h>
 #include <string.h>
diff --git a/src/sys_tree.c b/src/sys_tree.c
index a8acc53b..ba1e8bf5 100644
--- a/src/sys_tree.c
+++ b/src/sys_tree.c
@@ -22,6 +22,7 @@ Contributors:
 
 #include <math.h>
 #include <stdio.h>
+#include <inttypes.h>
 #include <limits.h>
 
 #include "mosquitto_broker_internal.h"