diff --git a/cpukit/posix/include/rtems/posix/config.h b/cpukit/posix/include/rtems/posix/config.h
index 460ddcb2a9..104bd84046 100644
--- a/cpukit/posix/include/rtems/posix/config.h
+++ b/cpukit/posix/include/rtems/posix/config.h
@@ -19,6 +19,8 @@
 #ifndef _RTEMS_POSIX_CONFIG_H
 #define _RTEMS_POSIX_CONFIG_H
 
+#include <stdint.h>
+
 #ifdef __cplusplus
 extern "C" {
 #endif