diff --git a/cpukit/include/rtems/posix/barrierimpl.h b/cpukit/include/rtems/posix/barrierimpl.h
index e6659c74fc..a8742d283a 100644
--- a/cpukit/include/rtems/posix/barrierimpl.h
+++ b/cpukit/include/rtems/posix/barrierimpl.h
@@ -50,6 +50,16 @@
 extern "C" {
 #endif
 
+/**
+ * @defgroup RTEMSImplPOSIXBarrier POSIX Barrier
+ *
+ * @ingroup RTEMSImplPOSIX
+ *
+ * @brief This group contains the POSIX barrier implementation.
+ *
+ * @{
+ */
+
 #define POSIX_BARRIER_MAGIC 0x1cf03773UL
 
 #define POSIX_BARRIER_TQ_OPERATIONS &_Thread_queue_Operations_FIFO
@@ -110,6 +120,8 @@ static inline void _POSIX_Barrier_Queue_release(
     }                                                                  \
   } while ( 0 )
 
+/** @} */
+
 #ifdef __cplusplus
 }
 #endif
diff --git a/cpukit/include/rtems/posix/condimpl.h b/cpukit/include/rtems/posix/condimpl.h
index 2853c8d244..6f260a343f 100644
--- a/cpukit/include/rtems/posix/condimpl.h
+++ b/cpukit/include/rtems/posix/condimpl.h
@@ -46,6 +46,16 @@
 extern "C" {
 #endif
 
+/**
+ * @defgroup RTEMSImplPOSIXConditionVariable POSIX Condition Variable
+ *
+ * @ingroup RTEMSImplPOSIX
+ *
+ * @brief This group contains the POSIX condition variable implementation.
+ *
+ * @{
+ */
+
 typedef struct {
   unsigned long              flags;
   Thread_queue_Syslock_queue Queue;
@@ -194,6 +204,8 @@ bool _POSIX_Condition_variables_Auto_initialization(
     }                                                                      \
   } while ( 0 )
 
+/** @} */
+
 #ifdef __cplusplus
 }
 #endif
diff --git a/cpukit/include/rtems/posix/mmanimpl.h b/cpukit/include/rtems/posix/mmanimpl.h
index 10ebd91c62..a36c7cebf7 100644
--- a/cpukit/include/rtems/posix/mmanimpl.h
+++ b/cpukit/include/rtems/posix/mmanimpl.h
@@ -43,6 +43,16 @@
 extern "C" {
 #endif
 
+/**
+ * @defgroup RTEMSImplPOSIXMman POSIX Memory Management
+ *
+ * @ingroup RTEMSImplPOSIX
+ *
+ * @brief This group contains the POSIX memory management implementation.
+ *
+ * @{
+ */
+
 /* FIXME: add Doxygen */
 
 /**
@@ -68,6 +78,8 @@ static inline void mmap_mappings_lock_release( void )
   rtems_libio_unlock();
 }
 
+/** @} */
+
 #ifdef __cplusplus
 }
 #endif
diff --git a/cpukit/include/rtems/posix/muteximpl.h b/cpukit/include/rtems/posix/muteximpl.h
index bed6a3bdea..54a98285de 100644
--- a/cpukit/include/rtems/posix/muteximpl.h
+++ b/cpukit/include/rtems/posix/muteximpl.h
@@ -48,6 +48,16 @@
 extern "C" {
 #endif
 
+/**
+ * @defgroup RTEMSImplPOSIXMutex POSIX Mutex
+ *
+ * @ingroup RTEMSImplPOSIX
+ *
+ * @brief This group contains the POSIX mutex implementation.
+ *
+ * @{
+ */
+
 typedef struct {
   unsigned long            flags;
   Mutex_recursive_Control  Recursive;
@@ -450,6 +460,8 @@ bool _POSIX_Mutex_Auto_initialization( POSIX_Mutex_Control *the_mutex );
     }                                                                    \
   } while ( 0 )
 
+/** @} */
+
 #ifdef __cplusplus
 }
 #endif
diff --git a/cpukit/include/rtems/posix/posixapi.h b/cpukit/include/rtems/posix/posixapi.h
index 76c2ad1a15..48701156c1 100644
--- a/cpukit/include/rtems/posix/posixapi.h
+++ b/cpukit/include/rtems/posix/posixapi.h
@@ -116,5 +116,21 @@ static inline bool _POSIX_Is_valid_clock_id( clockid_t clock_id )
 
 /** @} */
 
+/**
+ * @defgroup RTEMSImplPOSIXClock POSIX Clock
+ *
+ * @ingroup RTEMSImplPOSIX
+ *
+ * @brief This group contains the POSIX clock implementation.
+ */
+
+/**
+ * @defgroup RTEMSImplPOSIXScheduler POSIX Scheduler
+ *
+ * @ingroup RTEMSImplPOSIX
+ *
+ * @brief This group contains the POSIX scheduler implementation.
+ */
+
 #endif
 /* end of include file */
diff --git a/cpukit/include/rtems/posix/rwlockimpl.h b/cpukit/include/rtems/posix/rwlockimpl.h
index 86e0a82ba9..c8fb872bff 100644
--- a/cpukit/include/rtems/posix/rwlockimpl.h
+++ b/cpukit/include/rtems/posix/rwlockimpl.h
@@ -47,6 +47,16 @@
 extern "C" {
 #endif
 
+/**
+ * @defgroup RTEMSImplPOSIXRWLock POSIX Read-Write Lock
+ *
+ * @ingroup RTEMSImplPOSIX
+ *
+ * @brief This group contains the POSIX read-write lock implementation.
+ *
+ * @{
+ */
+
 #define POSIX_RWLOCK_MAGIC 0x9621dabdUL
 
 typedef struct {
@@ -75,6 +85,8 @@ bool _POSIX_RWLock_Auto_initialization( POSIX_RWLock_Control *the_rwlock );
     }                                                                     \
   } while ( 0 )
 
+/** @} */
+
 #ifdef __cplusplus
 }
 #endif
diff --git a/cpukit/include/rtems/posix/spinlockimpl.h b/cpukit/include/rtems/posix/spinlockimpl.h
index fb634546b6..ec8217878d 100644
--- a/cpukit/include/rtems/posix/spinlockimpl.h
+++ b/cpukit/include/rtems/posix/spinlockimpl.h
@@ -53,6 +53,16 @@
 extern "C" {
 #endif
 
+/**
+ * @defgroup RTEMSImplPOSIXSpinlock POSIX Spinlock
+ *
+ * @ingroup RTEMSImplPOSIX
+ *
+ * @brief This group contains the POSIX spinlock implementation.
+ *
+ * @{
+ */
+
 typedef struct {
 #if defined( RTEMS_SMP )
   SMP_ticket_lock_Control Lock;
@@ -69,6 +79,8 @@ static inline POSIX_Spinlock_Control *_POSIX_Spinlock_Get(
   return (POSIX_Spinlock_Control *) lock;
 }
 
+/** @} */
+
 #ifdef __cplusplus
 }
 #endif