diff --git a/mbed-client-randlib/randLIB.h b/mbed-client-randlib/randLIB.h
index f6979f042b..665b3deaf0 100644
--- a/mbed-client-randlib/randLIB.h
+++ b/mbed-client-randlib/randLIB.h
@@ -30,11 +30,13 @@
 
 #ifndef RANDLIB_H_
 #define RANDLIB_H_
+
+#include <stdint.h>
+
 #ifdef __cplusplus
 extern "C" {
 #endif
 
-
 /**
  * This library is made for getting random numbers for Timing needs in protocols.
  *