diff --git a/src/os/inc/osapi-version.h b/src/os/inc/osapi-version.h
index 7794b62b6..91ba0b184 100644
--- a/src/os/inc/osapi-version.h
+++ b/src/os/inc/osapi-version.h
@@ -38,7 +38,7 @@
  */
 #define OS_MAJOR_VERSION 5 /*!< @brief ONLY APPLY for OFFICIAL releases. Major version number. */
 #define OS_MINOR_VERSION 0 /*!< @brief ONLY APPLY for OFFICIAL releases. Minor version number. */
-#define OS_REVISION      0 /*!< @brief ONLY APPLY for OFFICIAL releases. Revision number. */
+#define OS_REVISION      99/*!< @brief ONLY APPLY for OFFICIAL releases. Revision version number. If set to "99" it indicates a development version.  */
 #define OS_MISSION_REV   0 /*!< @brief ONLY USED by MISSION Implementations. Mission revision */
 
 /*