diff --git a/src/bsp/pc-rtems/build_options.cmake b/src/bsp/pc-rtems/build_options.cmake
index d32e9245a..909fe8b7e 100644
--- a/src/bsp/pc-rtems/build_options.cmake
+++ b/src/bsp/pc-rtems/build_options.cmake
@@ -6,5 +6,12 @@
 
 # Link the RTEMS BSP with the "rtemscpu" system library
 target_link_libraries(osal_bsp
-    rtemscpu
+      rtemscpu
 )
+
+# Add the networking library for RTEMS 6+
+if(CMAKE_SYSTEM_VERSION GREATER 5)
+    target_link_libraries(osal_bsp
+         networking
+    )
+endif(CMAKE_SYSTEM_VERSION GREATER 5)
diff --git a/src/bsp/pc-rtems/src/bsp_start.c b/src/bsp/pc-rtems/src/bsp_start.c
index a95e861d2..172748692 100644
--- a/src/bsp/pc-rtems/src/bsp_start.c
+++ b/src/bsp/pc-rtems/src/bsp_start.c
@@ -35,7 +35,6 @@
 #include <ctype.h>
 #include <bsp.h>
 #include <rtems.h>
-#include <rtems/mkrootfs.h>
 #include <rtems/bdbuf.h>
 #include <rtems/blkdev.h>
 #include <rtems/diskdevs.h>
@@ -47,6 +46,10 @@
 #include <rtems/shell.h>
 #include <rtems/rtl/dlfcn-shell.h>
 
+#if defined(OS_RTEMS_4_DEPRECATED) || defined(OS_RTEMS_5)
+#include <rtems/mkrootfs.h>
+#endif
+
 #include "pcrtems_bsp_internal.h"
 
 /*
@@ -178,6 +181,7 @@ void OS_BSP_Setup(void)
         BSP_DEBUG("rtems_semaphore_create: %s\n", rtems_status_text(status));
     }
 
+#if defined(OS_RTEMS_4_DEPRECATED) || defined(OS_RTEMS_5)
     /*
     ** Create the RTEMS Root file system
     */
@@ -186,6 +190,7 @@ void OS_BSP_Setup(void)
     {
         printf("Creating Root file system failed: %s\n", rtems_status_text(status));
     }
+#endif
 
     /*
      * Create the mountpoint for the general purpose file system
@@ -413,10 +418,10 @@ rtems_task Init(rtems_task_argument ignored)
 #define CONFIGURE_MAXIMUM_MESSAGE_QUEUES (OS_MAX_QUEUES + 4)
 #define CONFIGURE_MAXIMUM_DRIVERS        10
 #define CONFIGURE_MAXIMUM_POSIX_KEYS     4
-#ifdef _RTEMS_5_
-#define CONFIGURE_MAXIMUM_FILE_DESCRIPTORS (OS_MAX_NUM_OPEN_FILES + 8)
-#else
+#ifdef OS_RTEMS_4_DEPRECATED
 #define CONFIGURE_LIBIO_MAXIMUM_FILE_DESCRIPTORS (OS_MAX_NUM_OPEN_FILES + 8)
+#else
+#define CONFIGURE_MAXIMUM_FILE_DESCRIPTORS (OS_MAX_NUM_OPEN_FILES + 8)
 #endif
 
 #define CONFIGURE_RTEMS_INIT_TASKS_TABLE
diff --git a/src/bsp/pc-rtems/src/pcrtems_bsp_internal.h b/src/bsp/pc-rtems/src/pcrtems_bsp_internal.h
index e752abd84..dc909d239 100644
--- a/src/bsp/pc-rtems/src/pcrtems_bsp_internal.h
+++ b/src/bsp/pc-rtems/src/pcrtems_bsp_internal.h
@@ -42,10 +42,10 @@
 /*
  * Handle the differences between RTEMS 5 and 4.11 copyright notice
  */
-#ifdef _RTEMS_5_
-#define OSAL_BSP_COPYRIGHT_NOTICE rtems_get_copyright_notice()
-#else
+#ifdef OS_RTEMS_4_DEPRECATED
 #define OSAL_BSP_COPYRIGHT_NOTICE _Copyright_Notice
+#else
+#define OSAL_BSP_COPYRIGHT_NOTICE rtems_get_copyright_notice()
 #endif
 
 /*
diff --git a/src/os/rtems/inc/os-rtems.h b/src/os/rtems/inc/os-rtems.h
index ca250a19c..e18ed3b15 100644
--- a/src/os/rtems/inc/os-rtems.h
+++ b/src/os/rtems/inc/os-rtems.h
@@ -51,21 +51,22 @@
                                      DEFINES
  ***************************************************************************************/
 /*
- * Handle the data structure and API name changes between RTEMS 4.11 and RTEMS 5.1
+ * Handle the data structure and API name changes between RTEMS 4.11 and RTEMS 5.1+
  */
-#ifdef _RTEMS_5_
-#define OSAL_HEAP_INFO_BLOCK    Heap_Information_block
-#define OSAL_UNRESOLV_REC_TYPE  rtems_rtl_unresolv_rec
-#define OSAL_UNRESOLVED_SYMBOL  rtems_rtl_unresolved_symbol
-#define OSAL_UNRESOLVED_ITERATE rtems_rtl_unresolved_iterate
-
-#else
+#ifdef OS_RTEMS_4_DEPRECATED
 
 #define OSAL_HEAP_INFO_BLOCK    region_information_block
 #define OSAL_UNRESOLV_REC_TYPE  rtems_rtl_unresolv_rec_t
 #define OSAL_UNRESOLVED_SYMBOL  rtems_rtl_unresolved_name
 #define OSAL_UNRESOLVED_ITERATE rtems_rtl_unresolved_interate
 
+#else
+
+#define OSAL_HEAP_INFO_BLOCK    Heap_Information_block
+#define OSAL_UNRESOLV_REC_TYPE  rtems_rtl_unresolv_rec
+#define OSAL_UNRESOLVED_SYMBOL  rtems_rtl_unresolved_symbol
+#define OSAL_UNRESOLVED_ITERATE rtems_rtl_unresolved_iterate
+
 #endif
 
 /****************************************************************************************
diff --git a/src/os/rtems/src/os-impl-filesys.c b/src/os/rtems/src/os-impl-filesys.c
index f211d8d62..efa175fe9 100644
--- a/src/os/rtems/src/os-impl-filesys.c
+++ b/src/os/rtems/src/os-impl-filesys.c
@@ -190,7 +190,9 @@ int32 OS_FileSysStartVolume_Impl(const OS_object_token_t *token)
      */
     if (return_code == OS_SUCCESS && local->system_mountpt[0] == 0)
     {
-        snprintf(local->system_mountpt, sizeof(local->system_mountpt), "/%s", local->volume_name);
+        local->system_mountpt[0]                                 = '/';
+        local->system_mountpt[sizeof(local->system_mountpt) - 1] = 0;
+        strncpy(&local->system_mountpt[1], local->volume_name, sizeof(local->system_mountpt) - 2);
         OS_DEBUG("OSAL: using mount point %s for %s\n", local->system_mountpt, local->volume_name);
     }
 
diff --git a/src/os/rtems/src/os-impl-loader.c b/src/os/rtems/src/os-impl-loader.c
index 4974aaa48..c044d12b9 100644
--- a/src/os/rtems/src/os-impl-loader.c
+++ b/src/os/rtems/src/os-impl-loader.c
@@ -39,7 +39,7 @@
                                    TYPEDEFS
  ***************************************************************************************/
 
-#ifndef _RTEMS_5_
+#ifdef OS_RTEMS_4_DEPRECATED
 
 typedef rtems_rtl_obj_t rtems_rtl_obj; /* Alias for RTEMS 4.11 */